{"product_id":"wrs-18-series-300-block-and-tackle-window-balance-stamp-17-1-non-tilt-size-17-1-5-8-lbs","title":"WRS 18\" Series 300 Block and Tackle Window Balance, Stamp 17-1, Non-Tilt - size: 17-1 (5-8 lbs)","description":"\u003ch3\u003eAbout this item\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eREPLACEMENT WINDOW SASH BALANCE FOR NON-TILT WINDOWS – If your double or single hung window won't stay up, drops on its own, or feels heavy to lift, a worn block and tackle balance is often the cause; this Series 300 balance restores smooth, controlled sash movement. This window sash balance is the correct replacement for sideload, non-tilt windows needing extra travel.\u003c\/li\u003e\n\u003cli\u003eSPRING AND PULLEY SYSTEM – A weighted spring inside the metal channel works with an internal pulley and cord to counterbalance the sash, holding the window open at any height without a prop. This is a genuine window balance spring replacement, not a generic window springs replacement kit, so it restores factory-matched performance rather than a universal fit.\u003c\/li\u003e\n\u003cli\u003e5\/8\" METAL CHANNEL CONSTRUCTION – Housed in a 5\/8\" channel with a spring rated 5 to 8 lbs for this stamp, matched to the weight of your existing sash for consistent, long-term performance. As a non-tilt block and tackle balance, it is built for consistent daily use across its full extended travel range.\u003c\/li\u003e\n\u003cli\u003eMEASURE BEFORE YOU ORDER – This balance measures 18\" long (metal channel only) and is stamped 17-1; compatibility varies by window manufacturer and model, so confirm your channel depth and length before ordering to avoid a return.\u003c\/li\u003e\n\u003cli\u003eWHAT YOU GET – One Series 300 block and tackle balance with an overall length of 18\" and a 5\/8\" channel depth, rated 5-8 lbs for stamp 17-1, guides pre-assembled; sold individually, take-out clips and other hardware not included.\u003c\/li\u003e\n\u003cli\u003eWRS — TRUSTED WINDOW HARDWARE SINCE 1989 – Window Repair Systems has been supplying precision-fit window and door hardware to homeowners, contractors, property managers, schools, and commercial facilities nationwide for over 35 years. Every part is sourced to help you repair — not replace. Shop with confidence.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WRS","offers":[{"title":"Default Title","offer_id":48386722037986,"sku":"B086R64FHF-size-17-1-5-8-lbs","price":11.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/0773\/7058\/files\/212ZAF6riHL_9b0ab2ef-fbe5-40d3-bb21-7c932f653c4c.jpg?v=1788992290","url":"https:\/\/fixtimber.us\/products\/wrs-18-series-300-block-and-tackle-window-balance-stamp-17-1-non-tilt-size-17-1-5-8-lbs","provider":"FixTimber","version":"1.0","type":"link"}