Product Components Material:*Actuator, Stem, Chaplet, Closure-- PP*Piston, Gasket, Piston, Sub-stem, Dip tube- PE *Spring-- High Chemical resistance steel contained 8 percent nickel *Ball: Glass Pump Specification: Closure Diameters: 24/410, 28/410, 28/400, 33/410 Screw Locking System,Dosage: 3.6-4.4gApplication: Shampoo, Shower foam, Hand Soap etcFor the first pump, 3-4 times of pumping will work.Multi-layer leakage-prevention design, for guarantee.Many colors available for choices. Closure Available:*33/410A(thin rib collar internation al standard)*33/410B(thin rib collar inland standard)*30/410B(thin rib collar)*33/410D(double ribbed collar)*33/410E(double ribbed collar)