... outer diameter, the axial cross section and the radial cross section.Hydraulic Seals – Type Piston SealsRod SealsBoth Piston & Rod SealsDust SealsBuffer RingWear Ring ... , ROI, SPNRI, WR, BRT, RYT, DB, TAY, VB, TC Pneumatic Cylinder appropriative seal:PGY, PNY, GLY, PSD, PDU, PPY, PRY Automotive ...