CaterConneX-Gas
Mechline’s range of CaterConneX-Gas Connections & Accessories features Dormont gas hoses.  Also available in the range, a variety of Safety Accessories and Compact Regulators/Governors

From Dormont is the Metric FlexTube product – ideal for internal gas appliance connections.

Engineers prefer Dormont hoses for installations because they're engineered to provide long service.  Non-slipping outer case that is PVC dipped and not shrink-wrapped ensures the sleeves don't slip and interfere with gas connections -- so less chance of a bad connection and leaking or weeping gas into the kitchen.