O.S. Engines 27425011 E-4040 GT15 Air 75AX Silencer FEATURES: Aluminum construction Preinstalled pressure tap INCLUDES: E-4040 Silencer Two 30x40mm Screws with 3mm hex socket 3x5mm Machine Screw INCLUDES: E-4040 Silencer Two 30x40mm Screws with 3mm hex socket 3x5mm Machine Screw