supply of supply of single sheave pulley block of different sizessupply of single sheave pulley block of different sizes,single sheave pulley block wheel size 3-1/2 x 1/2 grooved steel load of ca pacity 2.5 tonne as per requirement and quality of standard is 13156 (1991) for sheave p ulley blocks & asme b30. 9-2021 for steel wire rope sling make/brand : im, mahadev, pec, srec, ss te or similar [ warranty period: 30 months after the date of delivery ] ] , single sheave pulley block 3 1/2 x 1/2 fiber groove fiber for drawal of contact / caten ary wire, load capacity 2.5 tonne . is 13156 (1991) for sheave pulley blocks & asme b30. 9-2021 for steel wire rope sling make/brand : im, mahadev, pec, srec, sste or similar [ warranty period: 30 months after the date of delivery ] ] , single sheave pulley block 6 x 1 groove steel, suitable with load capacity 3 ton. is 13156 (1991) for sheave pulley blocks & asme b30. 9-2021 for steel wire rope sling make/brand:im, mahadev, pec, srec, sste or similar. [ warranty period: 30 months after the date of delivery ] ]