Quantity 1 piece(s) per pack Color Black Material Fiber + Aluminum alloy Diameter 62mm Compatible Camera Models EF / EFS lens installation on EOS camera Functions Extension ring to improve lens magnification Other Features Fiber metal shell + metal interface; Reduce the machine's endurance; High security. Good contact; Stable performance; Automatic extension rings suitable for 36mm 20mm and 13mm extension tube; Can be any combination to obtain the required magnification. Matches TTL metering and AE mode; Convenient connection tripod. Elimination of the center of gravity. Packing List 1 x Macro extension tube