Features: Suitable for all Canon EF & EF-S mount lenses. Combined of 3 tubes with different length of: 13mm, 21mm, 31mm; Can be flexibly combined into different focal lengths to use. Built-in electric pins, perfect for macro shooting. Superior lock pin which can tighten the tube joint, excellent TTL and autofocus. High quality and compact, net weight only 102g, super lightweight and portable. Specifications: Brand: Andoer Main Material: Plastic Suitable: For all Canon EF & EF-S mount lenses Item Weight: 102g / 3.6oz Package Size: 10 * 7.8 * 7.6cm / 3.9 * 3.1 * 3in Package Weight: 142g / 5oz Note: Only the macro extension tube ring is included. Package List: 1 * Macro Extension Tube Set 1 * Protective Bag 1 * User's Manual(English)