Aerosol valve 1.Longer shelf time. 2.Near 100% emptying. 3.Can be used in all angles. 4.Less noise when spraying. Aerosol Valve 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 connector, Aluminum foil pocket(4 layers). Material Tin, Aluminium, Nylon, PE etc. ...