Tenders for Supply of Heavy Duty Chain Pulley Block Isi Marked Confirming To Is:3832, Three Tonne Capacity, Forged Steel Shank Hooks To Is:15560, Lift 07 Meter. Double Falls Of Load Chain, Load Chain Diameter. 9.5 Mm, Gr.80 To Is:6216, Hand Chain 6 Mm. Diameter. Gr. 30 To Is:2429 Part-I. Total Length Of Hand Chain 12 Meter Long.