1Package Content: Macro adapter tube ring set consists of 10mm and 16mm rings and can be used alone or in combination for your need. 2Powerful Functions: With electronic contact, then support auto focus, auto exposure, etc., after connecting adapter ring, the body and the lens have the same operation. 3Fine Craft: Fine workman with high accuracy, wear resistant and durable, not damage the lens or camera. 4Convenient: Able to compatible with the camera body TTL metering and AE mode, allowing you to use the adapter ring without changing operating ways. 5Suitable Mount: Suitable for M4/3 mount camera body, like for Olympus EPM1, EPM2, EP1 cameras and other cameras. Item Type: Macro Extension Tube Material: Plastic + Alloy Color: Black Type: Auto Focus Product Size: Working Length: Approx.10mm+16mm/0.4in+0.6in Weight: Approx.60g/2.1oz Mount: M4/3 Mount Applicable Camera Model:For: GM1, GM5, GM7, GX1, GX7, GX8, GX85, GX9G, G1, G2, G3, G5, G6, G7, G9, GH1, GH2, GH3, GH4, GH5, GH5S, GF1, GF2, GF3, GF5, GF6, GF7, GF8, GF9, GF10 And Other Cameras For Olympus: E-PM1, E-PM2, E-P1, E-P2, E-P3, E-P5, E-M1, E-M1II, E-M5, E-M51II, E-M10, E-M10II, E-M1OIII, E-Pl1, E-PL2, E-PL3, E-PL5, E-PL6, E-PL7, E-PL8, E-PL9 And Other Cameras 1 x 16mm Macro Extension Tube 1 x 10mm Macro Extension Tube