Feature: 1. HIGH STRENGTH MATERIAL: Adopt industrial environmental protection high strength plastic steel, 304 stainless steel spring, and 304 stainless steel ball 2. SELF LOCKING DESIGN: Pneumatic quick connector adopt accurate automatic locking design, more sturdy and labor saving 3. WEAR AND CORROSION RESISTANT: Light weight with fast connection speed, wear resistant and corrosion resistant, can replace the quick connector made of traditional materials 4. ENERGY SAVING WITHOUT NOISE: Built in self sealing valve allows you to disconnect from pump without losing air, save energy and no more noise 5. WIDELY USE: Locking design, easy to connect and disconnect. Wide applications in automation equipment, natural gas, compressors Specification: Item Type: Pneumatic Quick Connector Material: Plastic steel, 304 stainless steel Maximum Pressure: 15 kgf/cm² Applicable Hose: PU hose, plastic pipe Working Temperature: -35℃~50℃ Specification Connection pipe size(approx.) Thread Connection hose inner diameter(approx.) SH20+PH20 8mm / 0.31in 1/4in 8 ~ 9mm / 0.31 ~ 0.35in SH30+PH30 10mm / 0.39in 3/8in 10 ~ 11mm / 0.39 ~ 0.43in SH40+PH40 12mm / 0.47in 1/2in 12 ~ 13mm / 0.47 ~ 0.51in . Package List: 1 x Pneumatic Quick Connector