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:green material:abs+PMMA size:200 x 40mm Package Contents: 1x water tank 2x half circle 2x screws 2x nut Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!