... .No need for flammable propellants 5.Customized. Specifications: Name Bag on valve Other name Aerosol valve bag, Valve in bag Structure 1" ... Valve, Mounting Cup, Outer gasket, Inner gasket, Stem, Spring, Housing, Bag-on-valve ... need for flammable propellan 5)Can be used in all angles 6)Less noise when spraying CET ISO 9001:2000 Vlave in bag for Pepper spray