➤The shell was made of quality metal, stable and durable for a long time use. Fast delivery: Expected to be delivered to you in 7-10 working days! | ➤3X magnification with 1.25 inch interface doubles the magnification of any 1.25 inch eyepiece. | ➤M42x0.75mm thread camera connect interface for telescope eyepieces. | ➤Multi coated optical lens offers a high quality observation without additional additional chromatic aberration, and making image more clear and sharp. | ➤It is easy to use, simply insert the eyepiece into Barlow lens,keeps lens clear easily with 2 pairs of dust cover.

➤Fully metal construction and anodizing aluminum process;durable for long time use. | ➤The extension tube has a T2 interior thread and a T2 exterior thread for elegantly solving spacing problems in astrophotography. | ➤Male thread - M42*0.75. Female thread - M42*0.75,eliminates a range of focusing problems. | ➤Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners.There are a total of 8 sets of products, which can be used in free combination. | ➤Matte treatment: Internal with matt thread, use the product to focus more