Main material: copper Color: silver / gold / black / iridescent Diameter: 24 mm Length: 46 mm Capacity: 5 ml Drip Tips: PEI810 feature: 24 mm RTA. 810 PEI drip irrigation technique. There are 4 colors to choose from. Double coil design with curved struts. Top fill system with large fill holes. Vacuum gold plated positive and negative columns. Ordinary glass tube 3.5ml, fat glass tube 5ml. Airflow control system (3 adjustable airflow holes on the bottom and 1 hole on the positive pole). notes: 1. Manual measurement, please allow 1~5 mm error, thank you. Please leave us a message, tell us the color you like, or we will send it randomly. 3. Due to differences between different displays, the image may not reflect the actual color of the project. We guarantee that the style is the same as shown in the picture. Thank you for your understanding.