Channel Balance

Thanks for posting. This looks like either a Series 380 or Series 385 Channel Balance. The only difference between these two balances is the depth of the bottom nylon shoe, so compare both with your old hardware to see what matches best. Be sure you're measuring the metal channel, not including the nylon fittings on either end, to obtain the length. You'll then need to choose a stamp option. Look for a stamp code somewhere on the metal channel that indicates this. If there is none, or you are uncertain, obtain the exact weight of the window sash. You can then match that exact weight with one of the weight ranges listed alongside each stamp option on the balance's shop page.