Preferred use is in pressurized units, excellent sealing of the housing bore, even when there is increased toughness to the bore, thermal expansion as well as split housing, benefits gained when sealing low viscosity as well as gaseous media, greater thermal stability as well as resistance to chemicals when the 75 KFM 595 is used. Added dust lip and sealing against medium to moderate dirt and dust ingress from external sources. The small axial dimensions will lead to temperature increases from friction heat.