PGT model SH-4000 Balance

Thanks for reaching out to us. My recommendation would be the S395-24 channel balance based on what is shown in your photos. The 2390 stamp on the metal channel is from an older rating system that we don't use so you would need to weigh your sash and refer to the chart under the product description on the S395-24 store page to determine the appropriate spring strength option for your balance.