mothers day gifts Feature:1. [COMPACT SIZES] These pneumatic silencers are small and compact, especially suitable for places with limited space.2. [4PCS IN 1 SET] Including 4pcs air exhaust mufflers, easy to install and maintain, with high noise reduction effect.3. [HIGH EFFICIENCY] With excellent noise reduction and filtering effects under dry conditions, has powerful functions.4. [HIGH PERFORMANCE] Metal silencer can be used in high temperature and high pressure environment, and has good impact resistance.5. [WIDE APPLICATION] Widely used in cylinders, solenoid valves, crankcases, gear boxes, fuel tanks, pneumatic tools, etc.Specification:Item Type: Pneumatic MufflerModel: PSF-4Material: All Copper + ABSMaximum Pressure Resistance: 1.0MpaSilencer: 30DBOperating Temperature Range: 5-60℃Uses: Widely used in cylinders, solenoid valves, crankcases, gear boxes, fuel tanks, pneumatic tools Package List:4 x MufflerNote:Please match the correct size before use.