Techtron Silver/Black 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 resist damage due to fuel spillage, chemical deterioration, fading, scratching and curling. All STIFFIE Alpha Numeric decals are finished with a UV Clear Coating to protect your decals from harmful Ultra Violet rays. STIFFIE uses 100% LEAD-FREE ink and marine grade vinyl. STIFFIE Alpha Numeric decals are environmentally safe and friendly. Use of 100% LEAD-FREE ink, biodegradable marine grade vinyl is standard.