I need 4 balances for a window
Thanks for posting. Could you confirm that the length of the metal channel, not including the nylon attachments, is 37"? If so, see our S380-37 or S385-37 Channel Balance. The only difference between these two Series is the 'depth' of the bottom nylon shoe. With the Series 380 the depth of this nylon shoe is 1", whereas with the Series 385 it is 1-3/32". Compare with your own and see what is best.
Once you know which balance to select, you must choose a stamp option. Your stamp of 36 2 conforms to our stamp option of 3620, which is for a window sash in the weight range of 13 through 18 lbs.
All costs including shipping will be calculated and shown to you once you choose the type and number of balances you need, and then select your preferred method of deliver during checkout. Let us know if you have any other questions.