WILDFIRE 18% PEPPER SPRAY is hot, hot, hot. Wildfire is 18% Oleo Resin Capsicum (pepper) -- a derivative of 3 Million Scoville Heat Units (SHU). Wildfire 18% pepper spray comes in 5 sizes: 1/2 ounce (available in red, blue and black), 1.5 ounce, 4 ounce, 9 ounce and 1 pound. 1/2 ounce and 1.5 oz units come with an injection molded poly holster, belt clip and keychain. "The Wildfire 18% formula is one of the hottest, and more importantly, the fastest reacting spray we've ever tested. This spray immediately permeates the pores of the skin, closes the eyes, and inhibits the respiratory system. What makes this product so effective is the purity of the pepper used in formulating this product...only food grade grade 3 million or 4 million scoville heat units pepper used." Larry Harris, Washington Labs