SMC VHS40-F04A Pressure Relief 3 Port Valve G1/2 3-Port Manual Finger Valve for releasing residual pressure. Used for the exhaust of the entire compressed air network. Red rotary button. Expandable using modules. Features and Benefits Is lockable with the use of a padlock (purchased separately) Rotary button painted in red for visibility Efficient control of compressed air GBP 39.99 1