paint brush: 1,Pure bristle,double times boiled 2,stainless steel ferrule 3,Wooden or plastic handle 4,Resin adhesive 1, ... Pure bristle,double times boiled 2,stainless steel ferrule 3,Wooden or plastic handle 4,Resin adhesive 5 ... Ferrule 1. Tin plate ferrule, it is economic.2. Stainless iron/steel ferrule. It resist rust.3. Chrome/gold plate ferrule, also ...