Description: 【Pool Cleaner Replacement Valve】: The G53 mechanism is designed for 180, 280, 380 and 3900 cleaners as a replacement for the G52 backup valve. 【Compatibility】:G53 mechanism is suitable for pool cleaner models including the 480 Pro, 3900 Sport, Vac Sweep 380, Vac Sweep 280 and the 280 . 【Material】: Made from PC material that ensures longevity and resistance to wear and tear. 【Dimensions】: Backup valve replacement  measures approximately 4.8 inches in length with an upper diameter of about .9-1 inch and a lower diameter of about .39 inches. 【Package Includes】: Contains 1 pieces G53 replacement valve mechanism for your convenience. Specification: Length: 4.8inch Withd Diameter: 0.9-1inch Bottom Diameter: 0.39inch Package Includes: 1 G53 Mechanism  Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you!