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Tandem (2 Coils)
12 lbs
The 37 Series is a standard coil spring window balance. This balance is designed for residential window applications. These balances feature a 17/32" channel depth and single, tandem, or triple case applications. These balance weights are evenly divided. For example, if your sash weighs 14lbs, you would need one 7lb balance on each side of your sash. TO SELECT THE CORRECT COIL SPRING BALANCE First, determine the weight of the balances you need by weighing the sash or looking at the stamp on the balance. The stamp will be a number printed onto the plastic housing. This number will be your balance weight. TO SELECT THE CORRECT COIL SPRING BALANCE: These balances are sold as a complete system including the coils and pivot lock shoe. These are based on the weight of your sash obtained in the first step. If you need assistance with configuring your coil spring balance system, please contact us before you place your order! ADDITIONAL INFORMATION Balances are sold individually unless otherwise noted AAMA Class 3 Verified Component For optimal performance, we recommend replacing both balances at the same time.