A 2.5-inch dimension is 63.5 mm. Confirm whether that size refers to the mounting opening, central passage or another feature of the grommet.
For a desk cable route, check the panel thickness, cutout profile and connector clearance. Leave suitable room for the cable bundle and its bends. Choose the part before cutting a new opening.
Select material and appearance for the application. Confirm available colors, quantities and delivery terms with the supplier. For nonstandard dimensions, provide a drawing or existing sample for review. A common-looking size is not evidence that it will fit a particular desk.
