Inflatable Boat Registration Letter and Number Kit - Black This Inflatable Boat Registration Letter and Number Kit - Black features 4 sets of the letters A-Z and the numbers 0-9 for a total of 146 decals. They are made from 4 mil outdoor vinyl with super-stick adhesive and can be used on boats or personal watercraft for both sides of the vessel. This boat lettering kit is designed to be used directly on Hypalon or PVC inflatables. Made from lead-free inks, these letters and boat numbers are UV c