Defense Technology's First Defense series is the world's most widely used pepper spray by law enforcement and corrections personnel. The First Defense MK-46R refill for the popular MK-46 crowd control system contains 46-ounces of formula rated at 0.7-percent major capsaicinoids. At the middle range of intensity, the formula delivers highly versatile applications. The refill solution is compatible with both the MK-46H horizontal and MK-46V vertical spray systems. All of Def-Tec's trademark formulas are verified through independent laboratory testing, ensuring quality and effectiveness needed in the line of duty.