Your search for "ap7821" revealed the following:

For APC AP7900 AP7800 AP7901 AP7921 AP7920 NT-AP7900-RM Rack Mount Bracket Kit

SKU: NSB-6142
Condition: New
Shipping: Overnight Options
Warranty: 365 days

$ 24.99

$ 39.99

• 65 in stock
Call if you need more

NEW APC AP7821 Metered Rack 8x IEC 60320 C13 208/230V 1U 16A PDU

SKU: NSN-0025
Condition: New
Shipping: Overnight Options
Warranty: 365 days

APC AP7821B Metered Rack 8x IEC 60320 C13 208/230V 1U 16A PDU

SKU: NSB-8278
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days