Hob/Sink Screw Covers (set)
These replace the existing covers which have a tendency to pop out and get lost, perhaps with age, or can get damaged with a hot pan. The new ones won’t be immortal either but at least you’ll have a source of spares!
Please check which hob/sink unit that you have - either older (wire ring over each burner) or newer (single casting over all burners), and order the correct variant.
Set A (set of 12)
There are 2 sizes of rubber bung (6 for the hob and 4 for the sink), and the set includes 7 and 5 so you have 1 spare of each size. This style has a separate wire ring for each burner.
Set B (set of 10)
The sink unit has 4 caps (5 supplied in the set) and 4 rubber bungs (5 supplied in the set) so you have 1 spare of each type. This style has a single black metal piece over both burners.