High Quality: Made of high quality engineering plastics,, strong, water Easy to Install: Securely connected, not easy to fall off. Make sure you put the connected part into the 70~80°water for before assmbling. After it cools down the tube stay tight. Usage: Used with drip irrigation to connect drip Micro-type tubing.Great for watering potted plants. Product may cause some plastic smell in the long time 's package. Pls open and hand where the air convection in 1-2 days. The plastic smell it go away normally. Size: The size is changed to an inner diameter of about 4mm, suitable for 4/7 positive tee joint colour:black material:plastic size:The inner diameter is about 4mm Package Contents: 800 x joint accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.