... supplied optional size:12mm,16mm, 20mm ,25mm, 32mm, 40mm and 50mm galvanized half saddles:1)material:zinc,stainless steel or as customers ... ' requirements2)optional size:16mm, 20mm ,25mm, 32mm, 40mm and 50mm ... accurate installation.5)OEM service is welcome.6)both half saddles and full saddles are supplied.7)packing:plastic bags as ...