These are custom T304 stainless u-bolts we supplied our customer in two different dimensional variants: the smaller round u-bolts measure 3-1/2" for the inside width and 6-1/2" for the inside depth while the larger version measures 6-5/8" at the inside width and 10" for the inside depth. 130 pieces of the larger u-bolts and 80 pieces of the smaller variant were provided to our customer, with a lead time of 4-5 business days from order confirmation. Material certs were made available upon request.