Rubber inserts add cushioning to your aluminum rubrails. These fit styles #5, #6 and #7. Rub rails and inserts sold separately. 50-foot maximum length per pieceDimensions: V12-0303 - 1" H x 1/2" W - (For Rails V21-9517, V21-9501, V21-9602, A12-0303 & A12-0305) Priced per foot V12-0338 - 1" H x 1/2" W - (For Rail A11-0638) 50' kit V12-0342 - 5/8" H x 5/16" W - (For Rails A11-0340 & A11-0342) 50' kit V12-0317 - 15/16" H x 3/8" W - (For Rail A11-0317) 50' kit V12-0334 - 3/4" H x 3/8" W - (For Rail A11-0334) 50' kit