Shopping at a Yahoo! Store is secured through SSL protection. However, we will take officially authorized purchase orders from schools if necessary. Plast-O-Matic PVC Flow Control Valve FC075EP-016-PV 3/4" $129.95 Festo OS-PK-3 Air Logic/Pressure Dependent Valve $19.95 ASCO HTX80143 Solenoid and 8222B54 Valve $199.95 Versa ESM-3201-66-H2-3336-24VDC 3-Way Valve $49.95 Nacom M442CPFR-V Diaphragm Pneumatic Valve $99.95 Matheson Gas Products Membrane Filter 6192-V4MM 0.02 Micron Rating $49.95