This is a Gorilla Glass plug for large gauge piercings! The material is glass and the size is 40mm. It's incredibly large and a heavy-duty plug for large gauge piercings. The various colors mixed together make it incredibly cool. This is a rare item with a unique design and size that is not often found on the market! Price negotiations are possible, so please let me know if you have any requests. *Please refrain from excessive discounts.