CEP12-DUSTCAP is a part of Caplugs, a line of molded plastic products used to seal and protect various types of products. The CEP12-DUSTCAP is a round, snap-on dust cap designed to fit products with a 12mmOD (Outer Diameter) thread. It is made of a flexible, durable plastic and is designed to seal and protect the threads of a 12mm product from dirt, dust, and other contaminants. The CEP12-DUSTCAP also provides an aesthetically pleasing finish, allowing for a professional-looking product.