Dell PowerEdge H872R, B4 rails friction type rails New /new open box
Very versatile rails fits these servers
R510/R515
R520/R530/R540/
R540xd R720/R720xd 
R730/R730xd R740/
R740xd/R741 5/
R7425 R7515
R7525 R750
R820/830
R7910
Precision 7920 Rack
NX3200
DX6012S/DR4000
SC8000 
 Rail kit are complete inner and outer R&L side
This unit comes with a 30 days warranty.