Anderson Narrowline Sash Spring

Question

The number is either B31 or 331 followed by 1/19 1135. Only other number on it is 11600-17. Assumption is the number is 331 which aligns with one of your replacement sash springs.

User submitted photos of a window balance.

Paul · Accepted Answer

Based on your stamp of "331," I recommend our 24-331 Andersen sash balance.