Tube to Hose Stems PI251208S 3/8 x 1/4 Tube to hose £0.43 PI251616S Connector, 1/2" OD tube to 1/2" hose stem £0.73 PI251612S Connector, 1/2" OD tube to 13/8" hose stem £0.66 PI251216S Connector, 3/8" OD tube to 1/2" hose stem £0.58 PI251212S Connector, 3/8" OD tube to 13/8" hose stem £0.48