By Las Water(PLEASE USE OZ-MZ100) Box Quantity: 50. Dimensions: Length: 160 mm Width: 50 mm Diameter: 20 mm. Connections / Fixings: 3/4 inch barb style connections both ends to connect to the water line. It also has a 3/8 inch barb style connector to connect the the air pipe from the Ozone. Use 2 small metal clips or jubilee clips to hold in place as well as glue for best results. How it Works: Air is drawn through the Ozone on a venturi system and water will pass through the jet sucking in air through the Ozone injector which will be connected to the Ozone. Compatible With: This unit can be fitted to virtually any Hot Tub with a venturi system.