... can include internal (rod seal), external (piston seal), symmetrical or axial seal. With the internal (rod) seal, the seal is fit into a housing ... SPG, LBH, LBI Engineering machinery appropriative seal:SPGW, SPG, SPGO, OUHR, OSI, OUY, HBY, HBTS, IUY, UH, ISI, IDI, USI, DKI, DKBI ... , DKH, DWI, NCF, ROI, SPNRI, WR, BRT, RYT, DB, TAY, VB, TC Pneumatic Cylinder appropriative seal ...