We provide Tender Bidding Support for Supply of Single Sheave Pulley Block 31/2 X 1/2 Groove Fiber For Drawal Of Catenary And Contact Wire. The Complete Block Including Head Fittings Shall Withstand A Proof Load Equal To Twice The Safe Working Load Swl. All The Steel Forging Parts Should Conforms To Is 1875 1992. The Material To Be Supplied Along With Test Certificate. Single Sheave Pulley Block 31/2 X 1/2 Groove Fiber For Drawal Of Catenary And Contact Wire..