... after galvanized. Electro galvanized, hot dipped, plastic-coated, stainless steel, PVC coated, etc.Characteristics:The structure is hard, surface is flat ... ,25,24,23,22,211/2"13mm25,24,23,22,21,20,5/8"16mm27,26,25,24,23,223/4 ... "20mm25,24,23,22,21,20,191"25mm25,24,23,22,21,20,19,181-1/4"32mm22,21,20,19,181-1 ... "50mm22,21,20,19,18,17,16,15,143"75mm21,20,19,18,17,16,15,144"100mm17,16,15,14 PVC ...