... 1, Heat & Acid resistance. 2, Easy operate. 3, Good price. Screw double sphere Rubber pipe joint Double Sphere Screwed Rubber Expansion ... solvents. Ideal for outdoor service. Do not use with petroleum oil service. Good general purpose elastomer with an effective operating range ... ~115 special to -30~250Applicable Mediawater,sea water,hot water,oil,acid,alkali etc