Detailed Product Introduction: 1: PU tubes are mainly used for pressure transfer in pneumatic systems; 2: They are indispensible parts in pneumatic systems; 3: AirTOP can provide high quality tubing with precise size and bright clean surface, a good solution for the pneumatic system. Other Informations: Payment: T/T, Western Union, 30% deposit and 70% balance before shipping; Shipment: Usually we send the goods by DHL, FedEx, UPS, TNT, or EMS or as you require; After we shipped your goods, we will send you the tracking number by E-mail. If you do not receive it within 7 business days after shipping, please contact us. Note: Please allow 4-7 working days for the arrival of your shipment. Thank you !