About Us: Piutouyar has been engaged in hardware and related products for many years. Customer 100% satisfaction is our first aim, we are committed to providing customers with better services and more high-quality and low-cost products. Piutouyar 40 Pcs Pneumatic Push to Connect Fittings 1/4" OD Pneumatic Fittings Kit Plastic Air Line Quick Fittings 10 Spliters + 10 Elbows + 10 Tee + 10 Straight Tubes (6mm combo) Description: 1.) The number on the lid represents the outer diameter of the trachea, so you can clearly identify it. 2.) It provides 360° rotation, even after installing the tubing. 3.) Do not use pneumatic fittings if the water temperature is above 60°C. 4.) Do not apply additional external loads on the pneumatic fittings, otherwise damage or leakage may occur. Specification: Product Name: Pneumatic push to connect fittings Color: Black+blue Material: Plastic Outer Diameter of Fit Hose: 1/4 inch(6mm) Working Pressure Range: 0-0.9 Mpa Temperature Range: 0-60°C | 32~140°F Package Included: 10 x 1/4 inch PU (Straight pneumatic Fittings) 10 x 1/4 inch PV (V Two Way Fittings) 10 x 1/4 inch PE (T Three Way Fittings) 10 x 1/4 inch PY (Y Three Way Fittings) Notes: 1.) All dimensions are measured manually and may be 1 - 2mm deviated. 2.) There may be some color aberration due to lighting problems. Please understand. 100% Satisfaction Guarantee: At Piutouyar, we strive to provide customers with higher quality products and better services. We hope that our customers are 100% happy and satisfied. Please believe in our strength. If you don't like our product or have any questions, please feel free to contact us, we will try our best to help you solve any problems. Or you can return it according to Amazon's guidelines for a refund or replacement.