Stainless steel post base fittings are designed to be floor mounted to support upright installations of strut. They are made with Type 316 SS and are intended for use with 1-5/8" x 1-5/8" strut.Gibson Stainless currently offers the post bases in five configurations: Standard, 45º Offset, Wall Mount, Double, and Standard Narrow.Material: 316 SSStandards: ASTM A240100% Made in USA