418 90° Socket 12mm ID - 418-12 Couplings are designed to be connected with cooling systems of plastic injection mouldings. They have a particular structure that assures reduced size and allows coupling using a single hand. Temperature & Pressures: The working pressures and working temperatures depend on the type of tube used; therefore the values must be determined in accordance with the tubes features. The following values apply only to Aignep products. • Parallel gas in conformity with ISO 228. • Water, cooling water, oil. • Flexible tubes in plastic and rubber.