Rubber grommets for reverb tanks, package of four.

Mounting Hole Diameter = 3/8"
Outer Diameter = 1/2"

Bag for Reverb Tank, Size: 17"  (43cm),
Black Tolex

Made in Germany
 

Bag for Reverb Tank, Size: 17"  (43cm),
Cocoa Redwine Tolex

Made in Germany
 

Bag for Reverb Tank, Size: 17"  (43cm),
Tweed Vinyl Tolex
Made in Germany