Amazon.com: 1-1/8" Corrosion Grenade Inhibitor for Air Conditioning Systems : Everything Else
4pcs Aluminum Car Tire Valve Cap Grenade Alloy Tyre Valve Stem Cover Air Dust Cap Tire Valve Truck Bike Wheel Rim Valve Stem Cap - buy 4pcs Aluminum Car Tire Valve Cap
M203 (lance-grenades) — Wikipédia
Vance & Hines VO2 AIR INTAKE GRENADE For Harley-Davidson Spare Parts Only 40041 | eBay
This WWII bunker used a fake air vent to return grenade to sender
Corrosion Inhibitor for AC Systems » Corrosion Grenade