1. Given that it is with 45 mm diameter tube, which enables to hold more water and speeds up cooling. 2. The upper and lower covers are high temperature resistant engineering plastics and the transparent part is acrylic. 3. It is because that such a water tank is with practicalilty for long-term attraction, thus, you can feel free to use it. 4. Moreover, the upper and lower covers are strong glue seals, and the sealing performance is better than that of ordinary water tanks. 5. For tight connection, advanced G1/4 thread is equipped, so that it can be safety and leak-free. Item Type: Water Tank Application: Computer Case Model Number: Water Cooling PC colour:red material:abs+PMMA size:200 x 40mm Package Contents: 2x water tank 4x half circle 4x screws 4x nut Only the above package content, other products are not included. Note: Light 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.