Stiffie Whipline Black/White SUPER STICKY 3" Alpha Numeric Registration Identification Numbers Stickers Decals for Sea-Doo SPARK, Inflatable Boats, RIBs, Hypalon/PVC, PWC and Boats. All STIFFIE SUPER STICKY DECALS incorporate permanent LSE (low surface energy) waterproof adhesive that adhere to Sea-Doo SPARK, PWC, Inflatable Boats, RIBs, Hypalon and PVC with no plastic plate required UNLESS you are going to DEFLATE your inflatable boat. All STIFFIE styles measures in at 3 in height and meet USCG requirements when installed per instruction. Application is easy; just peel away the decals from their backing and apply. All STIFFIE kits include 4 each of the letters A-Z and the numbers 0-9 for a total of 146 decals. All STIFFIE kits resist damage due to fuel spillage, chemical deterioration, fading, scratching and curling. STIFFIE Alpha Numeric decals are finished with a UV Clear Coating to protect them from harmful Ultra Violet rays. STIFFIE Alpha Numeric decals are environmentally safe and friendly. Use of 100% LEAD-FREE ink, biodegradable marine grade vinyl is standard.