1、WIDE APPLICATION: The telescope lens cap is suitable for 1.25 inch mounts and eyepieces, barlow, diagonal prism and other 1.25 inch telescope accessories. 2、ANTI DUST FUNCTION: This telescope dust cap can effectively protect your lens from dust and fine particles, keep your lens clean and clear. 3、REAL MACHINE OPENING MOULD: The real machine opening mould ensures a perfect fit with the astronomical telescope eyepiece and ensures the best protection. 4、LIGHTWEIGHT AND COMPACT: The dust cover is compact and portable, you can put it into the storage bag to protect your dust cover when not in use. 5、DURABLE MATERIAL: Made of durable, premium plastic that is safe and eco friendly. This material has good durability and ensures long lasting performance.