Specification Brand : CCYLEZ BulletPoint1 : Functional Design: Provides extra focusing distance to increase length extension. Sometimes necessary for certain eyepiece or telescope camera combinations for focusing. BulletPoint2 : Extended Focusing Needed: Often requires more focusing distance when observing short distances on the ground with a telescope or using field flatteners, correctors, or reducer lenses. BulletPoint3 : Secure Connection: Equipped with 2 fixed screws to support connecting 2 inch telescope eyepieces and astrophotography filters, preventing damage to telescope accessories. BulletPoint4 : Universal Compatibility: Features front end with M48x0.75mm thread for use with 2 inch telescope eyepieces and astrophotography filters, ensuring a secure fit. BulletPoint5 : Sturdy Construction: Anodized black finish prevents unnecessary reflections. Made of solid aluminum alloy material for strength, durability, and wear ItemName : 2in Telescope Extension Tube, Black Eyepiece Extender Adapter M48x0.75mm Threads, Astronomy Telescope Accessories, with 2 Inch Telescope Eyepieces and Astrophotography Filters ItemPackageDimensions_Height : 6 centimeters ItemPackageDimensions_Length : 15 centimeters ItemPackageDimensions_Width : 8 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : telescope-photo-adapters Manufacturer : CCYLEZ ModelName : Ccylezgfs21dcpx3-11 ModelNumber : CCYLEZgfs21dcpx3-11 PartNumber : CCYLEZgfs21dcpx3-11 ProductDescription : Item Type: Eyepiece Extension Tube Material: Aluminum Alloy + Copper Interface Size: Approx. 2 inches /50.8mm Thread Size: M48x0.75mm Color: Black