The hose reels rewind automatically the hose by a spring located in the drum and can lock it at the desired length. The hot-galvanized steel structure is moulded and coated with electrostatic polyester powder resistant to UV rays. The components which go in contact with the fluid are produced with materials resistant to oxidation and compatible with several chemical products. The special open design ensures an easy hose assembly and replacement as well as a control on the rewinding. The hose-guide arms can be fixed in three different positions according to the hose reel installation.