Several types of adapters are available to connect the older style 7-pole (ISO 1185) and (ISO 3731) systems to the newer style 15-pole(ISO 12098) system, and vice versa. These adapters are supplied with a cable conforming to ISO 4141, with external sheath made of Polyurethane(TPU) and available only with small size 20mm turn diameter. Standards: Conforms to ISO 12098, ISO 1185, ISO 3731 and ISO 4141 recommendations and standards External sheath of Polyurethane(TPU) maintains elasticity even at low temperatures The adapter is available with plastic body