One piece 28″ (27-3-720A-617-1) block and tackle side load window balance
VBS#27-3-720A-617-128” Block and Tackle Balance for Non Tilting WindowsStamp number: 27-3Channel Depth: 5/8″Channel length: 28″Top Guide Number: 720A Bottom Guide Number: 617Terminal Clip Type: KnotlessWeight Capacity(lbs.): 14-19Please check with us for more sizes/weight available Your browser does not support JavaScript. To view this page, enable JavaScript if it is disabled or upgrade your browser.