The Cougartron O-ring secures the marking felt (white or carbon) and yellow fabric on the Cougartron Marking Head.
The O-ring works with both Marking Head variants:
With Adaptor – WELC4029
and Without Adaptor – WELC4040
so it can be used with Cougartron marking machines (MK12 and MK612) and Cougartron Etching Sets.
Sold in a pack of 5 pieces.