Window Block & Tackle Parts

Question

Hello,

I need to order new block and tackle slides for my windows. The photos show the two sizes I need.

I need to order 2 of the top part (longer) which has "33 4 EX CMC 4" written on it. I also need to order 6 of the bottom part with "27 3 EX CMC 4" written on it. The second image shows the top of these parts to show the plastic cap it uses.

Can you please advise on what the part numbers are for these?

Thank You!

Jim

Casey · Accepted Answer

Hi Jim,

With this combination of attachments, you could have either an S380 or S385 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

Once you choose the correct replacement balance, you'll just need to choose the lengths that you need, as well as spring strength options based on the stamps on your metal channels.

Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.