Item Descriptions:-Product Size: The push to connect fittings tube and thread size is 4mm tube OD x 1/4NPT female thread. And the specific dimensions ensure a precise and secure connection.-Product parameters: Operating Pressure: 0-990Kpa; Negative pressure: -100Kpa; Operating temperature: 0 - 70 Degree Celsius.-Application range: The push-to-connect fittings are for quick connection and repair of polyurethane or nylon tubing to change water flow direction among pipes, and are widely used in air compression, vacuum, and pneumatic systems.-Material: Made of metals and plastics, which possess abrasion resistance, high-pressure tolerance, compression resistance, corrosion resistance, and is lightweight.-Easy to install: No additional seal is needed. Just a simple application of pressure is sufficient to connect to the pipe, and they will be firmly connected.Package:4x Push to Connect Tube FittingItem Specifications:Thread Size:1/4 NPTTube Size (OD):4mmType:Female Straight Thread ConnectorOperating Pressure:0990KpaNegative pressure:-100KpaOperating temperature:070 Degree CelsiusMaterial:Plastic,Metal