Eberhard Large Non-Locking D-Ring Gasket 
This large non-locking D-ring gasket is used in a variety of Eberhard non-locking D-ring handles.
 

D-Ring Gasket Material
Die Cut Rubber, Black

Non-Locking D-Ring Gasket Specifications
Thickness: 0 .045 in.
Dimensions:  7.09 in. H X 6.09 in W