Enough to Use: you will get 12 pieces of cooler tubes in the package, each measures about 0.39 inch/ 10 mm in inner diameter, about 0.55 inch/ 14 mm in outer diameter, about 30 inches/ 75 cm in length, enough to meet your PC water cooling needs Reliable Material: made of quality PETG material, cooling tube is designed to cater to your water cooling needs in your PC system; The robust and sturdy design enhances longevity and keeps reliable performance Easy to Cut and DIY: the clear plastic tube is flexible, easy to cut and bend, allowing for DIY based on your personal preferences and system requirements; Tailoring the tubing lengths can be achieved effortlessly, further adding to it's the convenience and friendly nature, nice for PC assemble beginners Ideal for PC Water Cooling: with PC hard tubing, your PC's water cooling system will receive an efficiency upgrade; Thickened wall design allows it to operate on a temperature range from -4 ?/ -20 ? to 143.6 ?/ 62 ?, offering your PC system a longer life Clear Sight: the clear color of the PETG hard tubing allows you to view the coolant flow in real time, ensuring the system is running smoothly; It adds an aesthetic appeal to your PC setup, the smooth inner wall and surface avoid the accumulation or retention of particles on the tube wall