Need replacement

Thanks for posting. This channel balance looks like either our Series 380 or Series 385 Channel Balance. The only difference between these two balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement. See the diagram below for reference. Compare both with your old balance to see what matches best.

Comparison of the S378, S380 and S385 balance shoes.

To know what length channel balance to pick, measure the length of the metal channel, but do not include the nylon end attachments in that measurement. You then have to choose a stamp option, which reflects the strength of the balance. Look for a stamp on the metal channel that indicates this. If there is none, or you are unsure, weigh the window sash. You can use that exact weight to choose the correct stamp option. 

For the Top Sash Guide, take a look at our 18-009 or 18-166. Look over the pictures on the shop pages and see if one of these matches what you have. Let me know if you have further questions.