4° Rectangular BaseTube Outer Diameter:1"Base: 3-1/2" x 3"Fastener: 1/4"(4)Material: 304 Stainless Steel* With 1/4-28 set screws, Part 6249 Whitecap 4° Rectangular Base - 316 Stainless Steel - 3-1/2" x 3"SKU: 11901$71.99PriceOut of Stock