Alcan window channel balance part# 2305

See either our S380-24 or S385-24. The only difference between these two balances is the 'depth' of the bottom nylon shoe, so compare both with your old part to see what matches best. You will then need to choose a stamp option. If your stamp code is '2305', this is a little unusual. Your best bet would be to weigh your window sash. You can then match that exact weight with one of the weight ranges listed alongside each stamp option on the product page. Let us know if you have any questions.