SMC Inline Ball Valve PVC Barb - 1/4 ID Barb x 1/4 ID Barb 6380390. SMC 6380390 PVC Ball Valve PVC 1/4 ID Barb x 1/4 ID Barb: Material of construction: Gray PVC Long Lever Handle 1/4 Barb x 1/4 Barb Buna-N o-ring Max Pressure: 125 PSI Max Temperature 140 F Ball Through Hole Diameter: 0.437 in Inline Shut Off Valves Irrigation Valves SMC Inline Ball Valve PVC Barb