Indusco stainless steel 316 heavy duty wire rope thimble designed to provide greater protection against wear and deformation of the wire rope eye. Meets dimensional requirements of Federal Specification FF-T-276B, Type III. Thimbles must always be inspected for cracks and wear before use. If worn, distorted or damaged, discard and replace. The thimble size must exactly correspond to the diameter or rope being used. Never use a smaller thimble because it will pinch the rope and cause broken and/or displaced wires. 3-1/4-inches maximum pin diameter. Inside measures 6-1/2-inches length by 3-1/2-inches width. 1-1/2-inches trade size. Measures 9.06-inches length by 7.12-inches width.