7000 or 8000 Series ShockWave Rear Airbag Assembly Only 

Diameter and load capacity:
7000 Series 4" diameter = 780 lbs. at 100 psi (Orange Writing)

Diameter and load capacity:
8000 Series 5" diameter = 1200 lbs. at 100 psi (White Writing) 

 X1 Airbag Assembly