supply of single sleeve pulley , supply of single sleeve pulley block wheel size 31/2 single sleeve pulley block groove d steel 1/2 size wheel ,wheel size 3-1/2,load capacity 2.5 tonne. as per ( is:13156(1991) or latest. (load t est certificate to be attached with supply ) make- iep or similar. ] , single sleeve pulley block 3. 1/2 x 1/2 fiber groove fiber for drawal of contact / catenary wir e, load capacity 2.5 tonne as per ( is:13156(1991) or latest. (load test certificate to be attached with supp ly ). ] , single sleeve pulley block 6 x 1 groove steel, suitable with load capacity 3 ton as per ( is :13156(1991) or latest. (load test certificate to be attached with supply). ]