Feature: 1. Easy to install, perfect replacement for the old or damaged one, reliable to use. 2. Made from high quality aluminum alloy, which is wear-resistant and not easy to damage. 3. Using fine workmanship CNC technology, the accuracy is higher, durable. 4. The female thread specification of the interface is M42x0.75mm, the male threadspecification is M42x0.75mm.

Fully aluminium anodized black. The extension tube has a T2 interior thread and a T2 exterior thread for elegantly solving spacing problems in astrophotography. Idea accessory to link or extend 7mm of the M42*0.75 products. Male thread M42*0.75; Female thread M42*0.7; eliminates a range of focusing problems. Use this 7mm extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners.

Country of Origin: China. Manufacturer: Celticbird. Date First Available: July 4, 2022. Best Sellers Rank: #47 in Lens Extension Tubes #186 in Telescope Photo Adapters. Customer Reviews: 5.0 out of 5 stars 4 ratings 5.0 out of 5 stars. Item model number: 14. : B0B5Q4SK18. Item Weight: 0.352 ounces. Package Dimensions: 4.92 x 4.25 x 0.47 inches.