1. Given that it is with 45 mm diameter tube, which enables to hold 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 , thus, you can to use it.4. Moreover, the upper and lower covers are strong glue seals, and the sealing performance is 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 TankApplication Computer CaseModel Number Water Cooling PCcolour greenmaterial abs PMMAsize 200 x 40mmPackage Contents 1x water tank2x half circle2x screws2x nutOnly 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.