Scanstrut RA 01 Rail Mount f GPS VHF Antenna EPAGASK3 Manufacturer Part Number Size HMS1 4 20X3 4EA Manufacturer Part Number Size HMS1 4 20X3 4EA 1 4 20 x 3 4 HMS1 4 20X1 1 2EA 1 4 20 x 1 1 2 HMS1 4 20X1EA 1 4 20 x 1 HMS1 4 20X2 1 2EA 1 4 20 x 2 1 2 HMS1 4 20X2EA 1 4 20 x 2 HMS1 4 20X3EA 1 4 20 x 3 HMS1 4 20X4EA 1 4 20 x 4 HMS1 4 20X5EA 1 4 20 x 5 HMS1 4 20X6EA 1 4 20 x 6 HMS10 24X1 1 2EA 10 24 x 1 1 2 HMS10 24X1EA 10 24 x 1 HMS10 24X2 1 2EA 10 24 x 2 1 2 HMS10 24X2EA 10 24 x 2 HMS10 24X3 4EA 10 24 x 3 4 HMS10 24X3EA 10 24 x 3 HMS6 32X1 1 2EA 6 32 x 1 1 2 HMS6 32X1EA 6 32 x 1 HMS6 32X3 4EA 6 32 x 3 4 HMS8 32X1 1 2EA 8 32 x 1 1 2 HMS8 32X1EA 8 32 x 1 HMS8 32X2 1 2EA 8 32 x 2 1 2 HMS8 32X2EA 8 32 x 2 HMS8 32X3 4EA 8 32 x 3 4 replaces: Mercury Marine 33765T Material Stainless Steel Designed to fit rails of 1" (25mm) in diameter and comes with a watertight seal for additional protection against exposure to the sea