a,Square tube bollards,Steel bollards b,Finish:Hot dipped galvanised yellow color c,Used mild steel Square 5"x 5"x 3/16" thick Square tube bollards, Steel bollards, yellow safety bollards, bollards and barriers, Stainless steel bollards a, Material: Used mild steel Square 5" x 5" x 3/16" thick structural tubing.b, Topped with a galvanized steel cap,.c, Solid 10" x 10" x 3/8" thick base plate.d, ...