String balances 23B (pair)

String balance compatible with most double-hung windows on the Quebec market. Technical specifications: 8". 50". length (first number) and spring strength (letter or number that follows) Important: Balances are always sold in pairs. To ensure proper operation, always replace both balances simultaneously. Professional service available: Vosthermos offers on-site installation service within a 100km radius around Montreal. Call us at 514-825-8411 for a free quote. Dimensions: length (first number) and spring strength (letter or number that follows).