The Hallite 601 is a high performance general purpose seal suitable for rod and piston use.Manufactured in Hythane 181 - Hallite's 601 is engineered to effect a good seal in most industrial cylinder applications.The sealing lips are accurately machined trimmed to ensure good low pressure sealing while the material resists extrusion at high pressures.NB: Hallite 606 is a preferred option for back to back piston applications.Part numbers commencing 46 . . . . . are designed to suit popular Asian housings.