WRS Series 300 Block & Tackle Balance – 28" Stamp 27-6 (30-34 lbs) | 5/8" Channel, Non-Tilt/Side-Load Window, Pre-Assembled w/ Guides, Galvanized($15.42Value)

Description

REPLACEMENT 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. SPRING 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. 5/8" METAL CHANNEL CONSTRUCTION – Housed in a 5/8" channel with a spring rated 30 to 34 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. MEASURE BEFORE YOU ORDER – This balance measures 28" long (metal channel only) and is stamped 27-6; compatibility varies by window manufacturer and model, so confirm your channel depth and length before ordering to avoid a return. WHAT YOU GET – One Series 300 block and tackle balance with an overall length of 28" and a 5/8" channel depth, rated 30-34 lbs for stamp 27-6, guides pre-assembled; sold individually, take-out clips and other hardware not included. WRS — 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. This WRS Series 300 block and tackle balance is a replacement part for sideload, non-tilt single and double hung windows. It restores the counterbalance that lets a window sash open, close, and hold its position at any height without dropping or feeling stuck. As a window sash balance, it is selected by matching its length and stamp to your existing extended-travel part. Inside the metal channel, a wound spring is paired with a small pulley system and a cord that connects to the sash. As the sash moves up or down, the cord plays out or retracts, and the spring stretches or compresses to counter the sash's weight, letting the window stay open on its own. Because it is built to this stamp's exact spring rate, it functions as a true window balancer replacement rather than a one-size-fits-all window springs replacement. The balance is built with a 5/8" metal channel and a spring rated for this stamp's 30 to 34 lb weight range, matched to the sash it supports. Series 300 balances are made for standard residential and commercial sideload window use and hold up to repeated daily opening and closing. Buyers searching for a non-tilt block and tackle balance or sash balance replacement for this stamp size will find this a direct match. Compatibility for block and tackle balances is determined by measuring the metal channel only, not the plastic top and bottom guides, and by reading the stamp on the balance body. This balance measures 28" and is stamped 27-6. Because channel depth and length vary between window manufacturers and models, measure your existing balance and confirm both dimensions before ordering. This balance is sold individually with the top and bottom guides pre-assembled, and installs by hand: pop the take-out clips at each side of the window jamb, lift the sash to release the old balance, then reverse the steps to hook in the new one. No tools are required for a standard installation, and no additional hardware is included. This makes it a straightforward