SMC VHK3R-01S-01SL Finger Valve MSRP: Now: $14.70 Was: VHK*R, Flame Resistant Finger ValveFinger valve series VHK has a large effective area of 2.0 to 17.5mm . This series begins with a minimum tube O.D of 4. The valve direction clearly indicates... VHK3R-01S-01SL