Replacement generic collar commonly used as the auger collar in select pellet stoves. The inner diameter measures 5/16", outer diameter is 5/8" and the thickness is 5/16". The collar includes a #10-32 x 1/8" Allen Key Set Screw. Made from carbon steel, designed to be strong and wear resistant. Its outer layer of zinc protects the steel from rust and extends the life of the collar. Sold individually.