PLUMB BOBS Solid Steel PB PB solid steel plumb bob features a rugged, nickel-plated steel construction for durability. Fea tures • One-piece hexagonal body design will not roll • Head has easy-thread feature for fast string insertion (String not included) Cat. No. EDP Weight oz grams PB-6 36112 6 170 PB-8 36113 8 230 PB-12 36114 12 340 PB-16 36115 16 450 PB-12 82 P lumb B obs