MEC MAYVILLE ENGNRNG INC Powder Bushings Mec Mayville #20 Powder Bushing Mec offers an assortment of different bushings to accommodate different loads and different powders. Consult your handloader guide for the proper bushings for your needs. SPECIFICATIONS: Mfg Item Num: 20 Category: RELOADING ACCESSORIES Type :Powder Bushing Caliber :N/A Size :#20 Quantity :Each Weight :N/A Function : Compatible With : Material : Including : Capacity :