Description: Made of soft PVC, suitable for flush-mount fishing rod holders Gasket Outside Dimensions: Approx. 97 x 76 mm / 3.82 x 2.99 inch Gasket Inner Hole Dimensions: Approx. 49 x 46 mm / 1.93 x 1.81 inch Cap Inner Diameter: Approx. 41 mm / 1.61 inch Screw Hole Diameter: Approx. 8 mm / 0.31 inch Package Includes: 1 Piece Cap and Gasket for Flush Mount Rod Holder (others are not included) Note: Due to the differences between different monitors, the picture may not reflect the actual color. There is 2-3% difference according to manual measurement, please check the size carefully before you buy the item