Tennis ball machine(8.8m tennis net) 1,Made of hose not steel(no rust) 2,Portable with ... bags 3,Inflatable in 2min 4,For clubs Tennis ball machine ... long time. ◊ StructureOur products compose of three-layer hose,connector and valve, can be pumped with a ... point of our products, enabling the valve and hose to be unite closely and sealed together. Preventing ...