Plug, to fit A-dec Solids Collector HVE Port; Pkg of 10Plugs off extra HVE holeEasily removed to add HVE 1/2" O.D. x 1/4" I.D.Package of 10A-dec is a registered trademark of A-dec, Inc.DCI has no affiliation with A-dec and A-dec has not authorized DCI replacement parts to be used on or in connection with A-dec products.