Doble coil window balance

A contractor from Gaithersburg. MD says:

Hi,

Could you help me and see if you have the part per photo attached in sto k? The stamp on the coil reads 5K

Thumbnail of the uploaded file named Coil balance
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Casey from SWISCO responded:

Hello,

Your pivot shoe resembles the 15-177, which uses the Series 152 coil springs. Your 5K stamp would correspond to the S152-5 springs. We also offer the 15-143 bushing, 15-144 cap, and 15-145 support barrel to install the coils. Review the specifications of these parts and the related videos to assist you. Thanks for posting! 

Alternate image for 15-177
Alternate image for 15-177

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