Furick Cup Replacement Diffuser Pack for the Moose Knuckle #14 Weld Cups includes 3 OEM diffusers to refurbish your welding cups back to "like new" condition. Install these with the cupped screen facing inside cup and push flat side into cup evenly. It may take a few tries to get the screen even. Make sure there is an even gap between the both screens, and that the screen facing the end is tight against the wall of the glass. For foolproof installation be sure to pickup one of the new Furick Cup Diffuser Screen Install Tool. For use with 3/32" Tungsten.