This product is a set of Olympus OM System Auto Extension Tubes in 7mm, 14mm, and 25mm sizes. Made by Olympus in Japan, these extension tubes are designed specifically for the Olympus OM-SYSTEM brand, with a twist-on fastening mechanism for easy attachment. The extension tubes allow photographers to achieve unique macro shots by extending the lens farther from the camera body, capturing images with a closer perspective. Perfect for photographers looking to explore the world of macro photography, these high-quality extension tubes come in their original box and case. never used