Item Type: Macro Bellow Material: Zinc Alloy Color: As Pictures Shown Weight: Approx. 421g / 14.9oz Maximum Working Size: Approx. 144mm / 5.7in Minimum Working Size: Approx. 37mm / 1.5in Application: Compatible with R Mount Cameras Package List 1 x Macro Bellow 1 x Screw 1Main Function: Macro bellow is an accessory connected between the fuselage and the photographic lens. Its function is to widen the distance between the main point of the lens and the focal plane, so as to achieve the purpose of magnifying photography. 2Use with Tripod: Macro extension bellow is used in conjunction with a tripod, which is stable and easy to use, enabling you to smoothly and continuously adjust the distance to the object you want to shoot. 3An Accordion Style Section: Macro extension bellow tube is an accordion style section that is inserted between the lens and the camera body. 4Take Finer Pictures: Macro lens extension bellow tube can perfectly replace the automatic close up adapter, and even take finer pictures than it. 5Application and Size: Macro bellow is compatible with R mount cameras. Maximum working size is 144mm / 5.7in, minimum working size is 37mm / 1.5in.