The RCBS Primer Plug and Sleeve comes in a variety of different sizes for use with all of the most popular cartridge calibers. These replacement parts are made from high-quality materials to ensure that they deliver the same level of quality as the original. These RCBS Primer Plugs and Sleeves are compatible with most c-frame type single-stage reloading presses as well as the RCBS Rock Chucker and the Reloader Special. If you are looking for a replacement primer plug and sleeve that works just like the original, look no further than the RCBS Primer Plug and Sleeve.