API LDTT200F Topper Tape&reg; for Mounting Truck Caps / Camper Shells (1 roll 2" x 30' long) LDTT200F  3/16 Thick X 2 Wide X 30 Long  Film Back Protects your trucks finish, seals out moisture, air and dust Formulated from Polyvinyl Chloride (PVC) for long service life Complete installation guide Made in the USA