Red Sea Max E, S & Reefer Replacement ATO Float Valve (Red Sea Part # 40373).
Fits: REEFER Peninsula 650, REEFER Peninsula 650 A, REEFER Peninsula 500, MAX E-170, MAX S-400, MAX S-500, MAX S-650, MAX E-260, REEFER NANO, REEFER 170, REEFER XL 200, REEFER 250, REEFER 250 V3, REEFER XL 300, REEFER 350, REEFER 350 V3, REEFER XL 425, REEFER 350 V3A, REEFER XL 425 V3, REEFER XL 425 V3A, REEFER 450, REEFER XL 525, REEFER XL 525 V3, REEFER XL 525 V3A, REEFER XXL 625, REEFER XXL 625 A, REEFER XXL 750-2, REEFER XXL 750, REEFER XXL 750 V3, REEFER 3XL 900, REEFER 170A, REEFER 250 V3A, REEFER-S 1000, REEFER-S 850