Description: 90 Degree Boat Rail End Stanchion Materials: Marine Grade 316 Stainless Steel Tube Inner Diameter: 25mm/ 1" Single Base Size: 29 x 24mm/ 1.14" x 0.94". Screw Hole Diameter: 5mm/ 0.2". Hole Space: 52mm/ 2" Package Includes: 1 Piece 25mm Boat Rail End Stanchion