Pneumatic Hose R6 1/4 Part No.: 1/4 R [Pneumatic Hose R6 1/4 Part No.: 1/4 R6 Hose Working Pressure-28 Bar. Specification: Air/Water/Hydraulic Hose Pipe R6 1/4 Dash Size R6-4 Id: 6.4 Mm, Od: 12.7 Mm Max Working Pressure 28 Bar. For Track Machines. Part Make: Plasser/Pix/Dunlop/Parker Or Equivalent. ]