Use this Dust Cap Kit from Neewer to protect 1.25" telescope eyepieces and other astronomical accessories from dust and scratches. The kit includes six dust caps and six dust plugs with an internal nonslip texture that keeps the cap securely in place so it won't come off. Each piece is made of a durable plastic to prevent cracking over time.
Compatibility
Compatible with 1.25" diameter telescope eyepieces, diagonal mirrors, T-ring adapters, Barlow lenses, focusers, and other accessories.