T-Top fishing Rod Holder Twin Aluminum clamp-on fit 1-1/2″, 1-7/8″, 2 inch horizontal or vertical fishing tower/leaning post/rail white black anodized (Silver Anodized). Color: Black, White, SIlver. Mounting Type: Rail Mount. Brand Name: Raider T-TOP. Made of high quality, marine-grade aluminum extrusions and cold-drawn tubing. Can be mounted to vertical or horizontal bar/rail/tube. Clamp turns and locks in place every 45 degrees. Rubber insert inside the tube to protect your fishing rod. Rubber liners to fit 1.5 (1-1/2)inch/38mm, 1.875(1-7/8) inch/48mm, 2 inch/51mm tubing. Combine the liners to fit more size of tubing. T-Top twin double rod holder aluminum clamp on fit 1.5″, 1.875″, 2″ inch horizontal or vertical fishing tower/leaning post/rail by Raider -Made of high quality, marine-grade aluminum extrusions and cold-drawn tubing -Clamp size: 2.125″/54mm, rubber liners to fit 1.5 (1-1/2)inch/38mm, 1.875(1-7/8) inch/48mm, 2 inch/51mm tubing -Rubber insert to protect your fishing rod from any wear against the metal surface -Inside diameter is 1 3/4″, Length is 10 1/2″ -Can be mounted to vertical or horizontal bars -Clamp turns and locks in place every 45 degrees -Easily mounts to T-Top or other hardtop, tower, radar arch, rail, or any structure made from 2″, 1-7/8″, 1-1/2″ pipe -Holds up to 1 fishing rod What is in the box -One Twin Rod holder -One 2 1/8″ clamp -Rubber inserts 1.5″, 1.875″, 2.