【Silicone 1\/4 inch (nominal) Tubing】Suitable for use in fish tanks and water dispensing machines 【Flexible Material】Constructed from high-quality, flexible silicone. The tubing dimensions are: Outer diameter 0.25\" x Length 51.5\"; Outer diameter 0.25\" X Length 18.5\". The inner diameter is 4mm\/0.16\", and the three adapter interfaces have a diameter of 20mm, suitable for 1\/2-inch inlet and outlet 【Multi-Purpose】Perfect for fluid handling, peristaltic pumps, siphoning, draining, aquaponics, water\/oil changes, and various other applications 【Great Value】Offers excellent performance and versatility, providing great value for your investment 【Multipurpose】Versatile for use in various household settings, including kitchens, bathrooms, courtyards, and more 【Assembly Video】Video Instructions link: https:\/\/youtu.be\/6EUNfL_8b6c. You can also search \"10180 TUBE half inch connection water tube motor in and outlet fixturedisplays\" on youtube to locate the video. You can also download video by following this link: https:\/\/www.fixturedisplays.com\/video\/10180 TUBE.AVI