Large quantity: 300 T pipes, the quantity is enough to meet your different needs for garden irrigation accessories. Suitable size: suitable for pipes with an inner diameter of 4mm and an outer diameter of 7mm. Purpose: Used to connect micro drip tubes via drip irrigation. Ideal for watering potted plants. QUICK AND EASY INSTALLATION: Easily installed without any additional tools, these pipe connectors are a great solution for indoor fixtures and outdoor gardens, and provide an efficient, durable and leak-proof connection to your conduits. Immerse the connection parts in 70~80 water for 10 seconds before assembly. Once cooled, the tube will remain airtight. Wide Application: The hose connector can be used for garden watering, irrigation, etc. Product Description Features: Ideal for watering potted plants. Suitable for 4mm/7mm pipe (inner diameter/outer diameter). Easy to install, firmly connected and not easy to fall off Specifications: Color: Black Size: Approx. 3.25 x 2.13 x 0.4cm/1.28 x 0.84 x 0.16inch (L x W x H). Packing list : 300 x T-tubes Note: 1. Due to various factors such as monitor brightness and light brightness, the actual color of the item may be slightly different from the picture shown on website. 2. Please allow 1-2mm differences due to manual measurement.