YAMAC Casters and Wheels Manufacturing Inc.Co., Turkey
Black Castor Wheels 50mm + Screws | 200KG | 4 Wheels for Furniture (4 With Brakes)
4 Furniture Roller Glide Hidden Invisible Wheel Castor Base Mount Swivels 360º | eBay
HIDDEN CASTER 2.5″ BLACK – Shepherd Hardware
Caster Wheel Small for Furniture 100Kg Weight Capacity 35mm diameter Black Twin Wheel Plywood Castor Plate with Lock/Stopper/Break Pack of 4 Pcs for Floor Mill Trolley,Refrigerator & Washing Machine : Amazon.in: Home
Hidden wheel furniture carriage systems - YouTube
How Furniture Casters Can Make Any Furnishing Multifunctional | Architectural Digest