Cable Grommet Flexible Silicone Cable Grommet Desk Rubber Grommets for Office Home Worktop Diameter 20 mm and Diameter 25 mm, Pack of 20 Total White : Amazon.co.uk: DIY & Tools
KoldLok SplitLok Integral Floor Grommet - EDP EUROPE
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75mm Floor and Desk Grommet - Powerdata Technologies | CPC
209mm Circular Cable Grommet (4x28mm holes) from £14.85