Extension Tube Kits 3/5/7/10/12/15/20/30/40mm for Eyepieces T Telescope
Features: Easy to use.
M42x0.75mm male and female thread.
Include 3/5/7/10/12/15/20/30/40mm, meet your different need.
Fully metal construction and anodizing aluminum process, durable in use.
Solving spacing problems in astrophotography and eliminates a range of focusing problems.

Specifications: Material: Aluminum Alloy
Male Thread: M42x0.75mm
Female Thread: M42x0.75mm

Package Includes: 1 Set Extension Tube

note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order.
Due to the difference between different monitors, the picture may not reflect the actual color of the item.