Molded from soft, lightweight material that's easy on your boat Very tough; resistant to chalking, splitting, deflating, or crushing Highly resistant to UV and fading Easy installation with (3) 5/16 inch holes Dimensions: 18" x 3 1/2" x 4 1/2" Attwood develops high value, engineered marine products that are tested on-site in our lab to make life on the water easier to enjoy