I provide 2 slightly different style 1" rings. Upon close examination you will see the back side (inner surface) of one steel ring is concave to fit around the circumference of the o'ring. Both steel rings are USA made steel.

Brand: Ingersoll Rand, CP, Snap on
Non-Domestic Product: No
Type: Air Tool Parts
Warranty: No
Custom Bundle: Yes
Manufacturer Part Number: CP797, 285A, 285B, 2850MAX, IM1800
Bundle Listing: Yes
Country/Region of Manufacture: United States
Modified Item: No