... , safe for users Reliable quality,good performance,long life End brushes specifications:1) End brushes with 1/4" shank2) Dimensions: 12, 17 ... , 19, 22, 25, 30mm3) Material: a) S: gray carbon steel wire crimped ... .25, 0.3, 0.35,0.5mmd) ST: knotted steel wire; 0.35, 0.5mme) A: aluminum oxide grist red nylon ...