The extension tube is specially designed for macro shooting, and it does not affect image quality. And simple design makes it easy to install.2 extension rings of 10mm and 16mm are included, and they can be used alone or in combination. After being installed, it can reduce the shortest focus distance of the lens to achieve partial macro effect.Made of high-quality ABS and metal material, the lens extension tube ring is durable, anti-rust, corrosion-resistant and wear-resistant.The length of the camera lens extension tube ring is approx 5.7cm, the width is approx 5.7cm, and the thickness is approx 3.2cm.It is compatible for Olympus GH4 GH5 GF3 GF5 GX1 EP1 EP2 EP3, and it suitable for Olympus M4/3 mount.Item Name: Extension Tube RingMaterial:ABS,MetalCompatible Models: for Panasonic Olympus GH4 GH5 GF3 GF5 GX1 EP1 EP2 EP3Applicable Mount: for Olympus M4/3 MountSize:5.7cmx5.7cmx3.2cm/2.24inx2.24inx1.26inNotes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 X User Manual1 X Extension Tube Ring Set (10mm+16mm)