Inset = newer style with no lip which typically sits on a ledge or on holders inside the opening.
Requirement for ordering :-
1. Make and model of machine
2. Plain or cut
3. Length and width of apeture in the top of cabinet.
lnsert for the top in Hideaway Sewing table, which is cut to fit the make and model of your machine.
Dimensions 300 x 285 mm approx.