HP JC672-61001 - Spare 7503-S fan tray assembly - Includes three 92mm x 92mm (3.62in x 3.62in) fans - Produces maximum air flow of 165CFM Retail
HP 0231A81B - Spare 7502 fan tray assembly - Includes three 92mm x 92mm (3.62in x 3.62in) fans - Produces maximum air flow of 165CFM Retail
HP 0231A81A - Spare 7503 fan tray assembly - Includes six 92mm x 92mm (3.62in x 3.62in) fans - Produces maximum air flow of 330CFM Retail
HP 0231A81E - Spare 7510 fan tray assembly - Includes six 92mm x 92mm (3.62in x 3.62in) fans and four 120mm x 120mm (4.72in x 4.72in) fans - Produces maximum air flow of 662CFM Retail