Item Type: Pneumatic Fitting_x000D_Material: Plastic Steel_x000D_Maximum Pressure Resistance: 20kgf/cm2_x000D_Working Pressure: 0~0.92kgf/cm2_x000D_Operating Temperature: -35~60_x000D_ModelThread ID(Approx.)Thread Model_x000D_SF+PF?2013mm / 0.51inR1/4_x000D_SF+PF?3013mm / 0.51inR3/8_x000D_SF+PF?4013mm / 0.51inR1/2 1Safer Locking: Built in high hardness steel ball ensures easy and secure connection as well as 20kgf/cm2 maximum pressure. 2Female Thread: The clear female thread simplifies the connection, also very durable with wearing and not likely to crack. 35 Sets in All: There are 5 sets of air coupler in the kit, and the largely quantity will meet your needs for replacement. 4Good Material: Adopting high quality plastic steel material, the pneumatic fitting is rustproof and sturdy with corrosion. 5Easy to Install: Comes with a light weight and a compact size, the convenient installation can be completed in minutes. 5 x Connector 5 x Locking Head