Screwless Flush Mount Rod Holder - 0 Degree - Black Liner - No LogoFeatures: 316L Stainless steel 1-5/8" Inner diameter 2-1/8" Outer diameter Fits 2-3/16" hole diameter Cap size 4-1/2" long x 3-5/8" wide 9" Tube length 1/4" wide x 1/2" tall gimbal bar Cast models feature a 1/2" drain hole No logo on the cap for a sleek, low profile The liner runs the full length of the tube Each rod holder includes a backing plate and installation nut Installation requires Model # 53679 Installation Socket