MEC Powder Bushing Aluminum No. 8 Size ME. This bushing works with progressive and single-stage charge bars is competitively priced and comes in a wide range of sizes for different loads as well as most powders. MEC strives to surpass not only company but also customer standards. Even in a small powder bushing there is precision engineering and strict quality-control checks. Because MEC goes out of its way to please the company has become popular around the world. Specifications for MEC Powder Bushing: Manufacturer: MEC Fabric/Material: Aluminum Package Contents: MEC Powder Bushing MEC ME05008: Powder Bushing Aluminum No. 8 Size