Features: By changing the inner diameter and appearance of the control valves, the fracture and leakage of the before chlorinator valves can be solved, and water flows speed can be more easily controlled. The R171016 swimming pool chlorinator has increased the base diameter, increased the contact area, and improved the stability of the chlorinator during operate. The gasket of the threaded cover adopts a flat prototype design, making it more fitting, improving sealing performances, and avoiding water leakage. Equipped with all the necessary accessories for installation, so you not have to worry about installation. During use, it is recommended to regularly lubricate the O-rings and control valves to avoid wear and reduce their service life. Regularly clean control valves and hoses with clean water to avoid blockages.(Lubrication oil without) Suitable for R171016 rainbow 300 chlorinator and is suitable for various on ground and underground swimming pools and spa centers. Specifications: Component: Metal and Plastic Size: about 17x52.7cm/6.69x20.75inch Black Long Tube Length: about 2m/6.56ft Black Short Tube Length: about 34cm/13.39inch Package Includes: 1set Pool Chlorinator note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.