Red Sea Reefer XXL/Peninsula Large Return Outlet Nozzle Assembly Part # R42319
 
Fits
Reefer XL 300 
Reefer 350 V3A
Reefer XL 425 V3, Reefer XL 425 V3A, 
Reefer Peninsula 500,
Reefer XL 525 V3, Reefer XL 525 V3A
Reefer XXL 625, Reefer XXL 625 A, Reefer 625 G2,
Reefer Peninsula 650, Reefer Peninsula 650A
Reefer XXL 750,  Reefer XXL 750-2, Reefer XXL 750 V3, Reefer 750 G2
Reefer 3XL 900