NBR	Resistant against: oil, pressure, abrasion High
	elasticity and mechanical strength. Suitable for
	general Hydraulic and Pneumatic seal; unsuitable for
	working under sunlight and ultraviolet.
	Application temperature: -20-120C
EPDM	Resistant against: chemcical reagents, Suitable for
	Hydraulic fluid of organic phosphate.
	Application temperature: -50-150C
SILICON RUBBER	Resistant against: heat, freeze. Low mechanical
	strength,bad bending and abrasion. Suitable for fixed
	seal resistant heat and freeze; unsuitable for
	working under high mechanical strength.
	Application temperature: -80-150C
VITON	Resistant against: heat,oil, reagents, Suitable for
	high temperature Hydraulic equipment and vacuum
	equipment.
	Application temperature: -30-230C
HNBR	Resistant against: gasoline,Freon, oil, acid, ozone,
	alkali, heating and freeze High strength and high
	abrasion.
	Application temperature: -20-120C