C.E. Smith Pontoon Guide-On Roller. Minimum friction rolling action easily guide pontoon boat onto trailer. Height is 25" above trailer frame. Mount with roller bunks 2-3" from pontoons on a trailer fram cross member. Specifications for C.E. Smith Roller Pontoon Guide-On: Manufacturer: C.E. Smith Color: Silver Features of C.E. Smith Roller Pontoon Guide-On Fits frames up to 3" wide x 4-1/4" tall U-bolt mounting brackets Includes two rubber roller bunks Galvanized steel construction Zinc plated hardware For larger trailer frames check out the Large Frame U-Bolt Kit (11416). Package Contents: C.E. Smith Roller Pontoon Guide-On C.E. Smith 27672: Pontoon Guide-On Roller