Hafele 429.94.612 Metal Cable Grommet, One-Piece, Round, diameter 40 mm For workplace organization, Brushed nickel, with 12 x 15 mm opening brushed, Nickel plated
GT001RB - 50mm - Gromtec
KT cable grommets, grey for cable diameters 1 - 35 mm / IP66 / IP68 / UL Type 12/4X