Plastic cover for 3/8" ballasts 29"long

Hello,

Unfortunately, we do not carry replacements for the plastic covers for old-style spiral balances. Our modern replacements have metal tubes without a plastic cover. If you could show us a photo of your spiral balance removed from the window and confirm the exact length, we'd be happy to confirm if we carry a suitable replacement for your balance assembly. Thank you! 

Thanks for getting back to us. I see that you purchased some S900 spiral balances. If you're referring to balance covers that install over the spirals in the window jamb, unfortunately, that is not something that we carry but a local hardware store may be able to supply them.