These hole plugs from B&Q are for infilling unused furniture hinge holes.
19mm Hole Plug, Blanking or Blind Grommet, Black PVC — VehicleClips
Midwest Fastener® 1 Black Hole Plugs - 6 Count at Menards®
Unbraked Light duty Fixed Castor WC6, (Dia)29.5mm (H)33mm (Max. Weight)15kg
Essentials Plug and Tunnels Pack –
British Gypsum GypFrame Steel Angle GA3 3200mm x 32mm x 19mm Pack of 10
Heyiarbeit 30pcs Hole Plugs 30mm/1.18 Nylon Plastic Round Snap in Type Locking Hole Tube Furniture Fencing Post Pipe Insert End Caps Black Tone - Yahoo Shopping
Cladco HC19 19mm Black Colour Caps - Pack of 100
Black Hole plug (Dia)19mm, Pack of 10
Baomain Plastic Black Locking Hole Plugs Panel Hole Diameter 1/2 (12.6mm) HP-13 Black (100PCS) : Industrial & Scientific
Mixx USB Plug Charger Triple Pack Black
Cable Hole Entry or Exit Brick Blast Exterior Wall Cover Plate Brown [10 Pack]
Wardrobe rails & fittings
【Parameters】- Fit hole diameter: 19mm/0.74; Height: 10.2mm/0.4; Color: Black. 【High Quality】- The hole plugs are made of high-quality engineering
Fielect 100pcs Hole Plugs Black 3/4 Inch (19mm) Plastic Hole Cover, Flush Type Round Snap Panel Locking Hole Plugs Cover, Pipe Post End Cap for
19mm Mushroom Head Push Button Switch Momentary IP65 SPST – APIELE
Black Hole plug (Dia)19mm, Pack of 10