ITEM NAME:4x Marine Grade Stainless Steel Boat Hand Rail Fittings 1" After Stanchion Description: Heavy duty 316 stainless steel, surface polishing Marine grade, suitable for 1" / 25mm hand rails Base Size: approx. 40 x 21mm / 1.57 x 0.83inch Hole Spacing: approx. 27mm / 1.06inch Hole Diameter: approx. 5mm / 0.2inch Package Includes: 4 Piece Boat Hand Rail Fitting.4 Piece Boat Hand Rail Fitting. Marine grade, suitable for 1" / 25mm hand rails. Heavy duty 316 stainless steel, surface polishing. Base Size: approx.