Replace English 400' Mag O-Ring

The original rubber O-Rings on the take-up arm of the English 400 foot magazine were 20mm in diameter with a 14mm diameter hole in the center.  Good results have been reported with O-Rings used for household plumbing.

The measurements are:

• 5/8 inches OD by 7/16 inches ID by 3/32″ WAL

After installing, it is necessary to tug at the O-Ring to more-or-less even it out.