FMS Ravenox Safety Whistle for Boating | Emergency Survival Rescue Whistle Web End | Survival Whistle for Survival Kit | Marine Whistle for Great Outdoors | Emergency Whistle for Camping Accessories EMERGENCY WHISTLE FOR GREAT OUTDOORS: Designed for the toughest environments including salt water, marine, boats, nautical or outdoor use. MARINE WHISTLE AND OUTDOOR USE: Loudest whistle on the market. Use with backpacks, bags, tactical bags, camping, hiking, emergency, survival kit, pants, jacket, and other camping accessories. It is also perfect to use outdoors with kayaking, traveling, hunting and so much more. SURVIVAL WHISTLE AVAILABILITY: Each whistle is available in 1-packs, 2-packs, 4-packs, 10-packs, 25-packs, 50-packs, 100-packs, or 500-packs and 1,000-packs. Measures 15.1mm x 44.7mm x 11.6mm. SAFETY WHISTLE FOR BOATING: Rescue whistle is powerful, rugged and reliable. Handles well in extreme conditions and an excellent solution for safety situations. Made from high-impact, heavy duty plastic. No metal and pea-less whistle, corrosion-resistant. Its design is ultra-stylish and ultra-loud due to its dual-chamber. Its simple and compact. Perfect for any survival kit or boating and marine use. CAMPING ACCESSORIES 100% RISK-FREE: We are a USA, CERTIFIED, Service-Disabled, Veteran-Owned, Woman-Led business that offers a one-year, money-back guarantee on all safety whistle for boating purchases