Description: Boat rail / stanchion round base For 30mm rail / tube 60 Degree Professional marine grade cast 316 stainless steel Strong corrosion resistance and durable in saltwater circumstance High polished surface for mirror-like appearance and to match modern watercraft/boat/yacht Specification: Material: 316 Stainless steel Color: Silver Base Diameter: Approx. 2.56 inch/65 mm Round Hole Inner Diameter: Approx. 0.87 inch/22 mm Screw Hole Inner Diameter: Approx. 0.2 inch/5 mm Two holes center spacing: Approx. 1.42 inch/36 mm Package Includes: 1 Piece Boat Rail / Stanchion Round Base