{"product_id":"up-down-pull-window-hardware","title":"Vertical Sliding Sash Window Balance \u0026 Lock Hardware Kit (Wooden Windows)","description":"\u003cp\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003cbr\u003e\nThe American-Style Vertical Sliding Sash Window Hardware Kit (Constant-Force Spring Counterbalance System) is an engineered, architectural-grade sash balance and locking mechanism designed for traditional and contemporary wooden hung windows, pass-through serveries, and interior sliding wooden partition sashes. Utilizing precision-wound constant-force stainless steel clockwork coil springs housed in heavy-duty nylon carrier blocks, this mechanism counterbalances sash weight effortlessly, allowing the movable window to hover securely at any open height without falling or slamming. Complete with dual cam flip sash locks, bottom tilt sliders, upper sash retainers, and optional extruded aluminum slide channels, it provides smooth, quiet vertical ventilation and positive security for residential windows, custom cafes, and servery bars.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstant-Force Spring Hover Mechanism:\u003c\/strong\u003e High-tensile stainless steel spiral clockwork balance springs provide constant counteracting torque across the entire vertical stroke, holding the window firmly at any desired opening position.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eArchitectural Wooden Frame Compatibility:\u003c\/strong\u003e Engineered specifically for wooden sash windows, custom pass-through counter sashes, and historic wood window restorations (compatible with sash leaf heights 350 mm – 900 mm and widths 350 mm – 1200 mm).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Security Cam \u0026amp; Flip Locks:\u003c\/strong\u003e Includes a top-mounted central sash sweep lock and dual lateral flip locks (left and right handed) to draw the sliding sash tightly against the upper frame for weather-tight sealing and forced-entry deterrence.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWear-Resistant Nylon Slider Blocks:\u003c\/strong\u003e Self-lubricating engineering nylon slider shoes and guide retainers ensure low-friction, whisper-quiet vertical travel without wood-on-wood binding or jamming.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScalable Spring Capacity Models (4.5 kg – 18 kg):\u003c\/strong\u003e Modular spring mounting seats allow precise matching to window weight, from lightweight wooden sashes up to heavy double-glazed sashes:\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cem\u003eModel 1 (Single Seat \/ 2 Springs):\u003c\/em\u003e Rated 3 kg – 6 kg (Recommended sash weight: 4.5 kg \/ 10 lbs)\u003c\/li\u003e\n      \u003cli\u003e\n\u003cem\u003eModel 2 (Dual Seat \/ 4 Springs):\u003c\/em\u003e Rated 4 kg – 13 kg (Recommended sash weight: 9.0 kg \/ 20 lbs)\u003c\/li\u003e\n      \u003cli\u003e\n\u003cem\u003eModel 3 (Triple Seat \/ 6 Springs):\u003c\/em\u003e Rated 6 kg – 19 kg (Recommended sash weight: 13.5 kg \/ 30 lbs)\u003c\/li\u003e\n      \u003cli\u003e\n\u003cem\u003eModel 4 (Quad Seat \/ 8 Springs):\u003c\/em\u003e Rated 9 kg – 27 kg (Recommended sash weight: 18.0 kg \/ 40 lbs)\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptional Heavy-Duty Aluminum Guide Tracks:\u003c\/strong\u003e Available as hardware-only balance packs or paired with 1-meter (39.4\") extruded bronze-anodized aluminum slide tracks for clean recessed framing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e American-Style Vertical Sliding Sash Window Balance \u0026amp; Lock Hardware Kit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpring Material:\u003c\/strong\u003e High-Grade Tempered Stainless Steel Clockwork Spiral Springs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHousing \u0026amp; Components:\u003c\/strong\u003e Heavy-Duty Engineering Nylon Carrier Bases, Die-Cast Zinc Alloy Window Locks \u0026amp; Latches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish \/ Color:\u003c\/strong\u003e Matte Black Window Locks; Natural Bronze Springs; Sand Bronze Extruded Aluminum Track\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSash Movement:\u003c\/strong\u003e Vertical Up-and-Down Sliding with Infinite Hover \/ Arbitrary Position Hold\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplicable Window Dimensions:\u003c\/strong\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cem\u003eMovable Window Width:\u003c\/em\u003e 350 mm – 1200 mm (13.8\" – 47.2\")\u003c\/li\u003e\n      \u003cli\u003e\n\u003cem\u003eMovable Window Height:\u003c\/em\u003e 350 mm – 900 mm (13.8\" – 35.4\")\u003c\/li\u003e\n      \u003cli\u003e\n\u003cem\u003eSide Frame Clearance Gap:\u003c\/em\u003e Recommended 2 mm per side (sealing strip groove)\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardware Pack Contents:\u003c\/strong\u003e Balance Spring Assemblies (2, 4, 6, or 8 springs according to model), 2x Nylon Slider Shoes, 2x Stainless Steel Hook Plates, 1x Center Cam Sash Lock, 2x Side Flip Latches, and Mounting Screws\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Kitchen pass-through servery windows, residential single-hung and double-hung wooden windows, cafe bar service counter windows, and historical architectural renovations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWholesale \u0026amp; OEM Capabilities\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Factory Supply:\u003c\/strong\u003e Precision manufactured by Ningbo Dimon for window and door manufacturers, architectural millwork contractors, and building hardware distributors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Customization:\u003c\/strong\u003e Custom spring tension ratings for non-standard glass thicknesses, customized sash lock designs and finishes (Brushed Brass, Antique Copper, White), and pre-cut aluminum track lengths.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExport Packaging:\u003c\/strong\u003e Hardware components individually bagged and boxed in reinforced inner cartons with detailed dimensional installation templates; master export cartons palletized for international shipping.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ningbo Dimon Metal Products Co.,Ltd","offers":[{"title":"Wooden frame model 2","offer_id":46851190227083,"sku":null,"price":165.0,"currency_code":"USD","in_stock":true},{"title":"Wooden frame model 1","offer_id":46851190259851,"sku":null,"price":133.0,"currency_code":"USD","in_stock":true},{"title":"Wooden frame model 4","offer_id":46851190292619,"sku":null,"price":221.0,"currency_code":"USD","in_stock":true},{"title":"Wooden frame model 3","offer_id":46851190325387,"sku":null,"price":189.0,"currency_code":"USD","in_stock":true},{"title":"1 meter track","offer_id":46851190358155,"sku":null,"price":146.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0575\/0295\/7707\/files\/4d6c6eb18b856e2f50b47742bcb41f46.jpg?v=1790133546","url":"https:\/\/nbdimon.myshopify.com\/en-ae\/products\/up-down-pull-window-hardware","provider":"Ningbo Dimon Metal Products Co.,Ltd","version":"1.0","type":"link"}