Features:Suitable for all EF & EF-S mount lenses.Combined of 3 tubes with different length of: 13mm, 21mm, 31mm; Can be flexibly combined into different lengths to use.Built-in electric pins, perfect for macro .Superior lock pin which can tighten the tube joint, TTL and autofocus.Colour: Black: Aluminum High quality and , net weight only 102g, super lightweight and portable.Specifications:Suitable: For all EF & EF-S mount lensesItem Weight: 102g / 3.6ozNote:Only the macro extension tube ring is included.Package Contents:1 x Auto Macro Extension Tube SetOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.