Milgard replacement part

Thanks for posting! The replacement balances you have can either be replaced with the S380-09 or the S385-09. To confirm the series, you'll need to measurement the depth of your bottom shoe.

Since your stamp is hard to make out, it would be best to obtain the exact weight of the sash. There is a chart below the product description for both of these balances with a list for the weight range each stamp can support.

Comparison of the S380 and S385 balance shoes.

It is difficult to tell what the measurement is from the photos of the measuring tape, you'll need to be sure to double check this before making your purchase. If it is anything over 1", you'll need the S385.

Based on the chart below the product description, you'll need the 810 stamp option.