Block and tackle window spring

Question

35" Long on the channel, 1/2 wide,
34 4 Caldwell KL 3 ea
14 4? (stamp is faded) Caldwell BM 3ea

Tom · Accepted Answer

Thanks for your photos. Based on what I see here, you have either our S380-35 or S385-35, or S378-35 depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match.

Comparison of the S378, S380 and S385 balance shoes.