Extremely Durable and Flexible Material Manufactured with a reef-safe TPU (Thermoplastic Polyurethane) Wide compatibility Works with genuine 1/2in, 3/4" or 1" Loc-Line modular hose and most other modular hoses of similar size Unique Patented Internal Design Same trusted design as the original Random Flow Generator Nozzle Includes a single Flex Series Random Flow Generator Nozzle The 1" model includes a single Flex Series 1in Random Flow Generator in the retail packaging as shown. MPT threaded fitting not included.