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4-Pk. 1/2-In. I.D. Flexible Black Vinyl Hole Grommet
4 Pack, 1/2" Inside Diameter, 11/16" Drill Hole, 25/32" Overall Diameter, Flexible Black Vinyl Hole Grommet, Snaps Into Holes In Steel Electrical Boxes, Panels Or Sheeting To Protect Electrical Cable/Wire.