SOUJOY 8 Pack Furniture Caster Cup, Rubber Bed Stoppers, Round Chair Coasters Wheel Cups Fits to All Wheels of Furniture, Sofas, Beds, Chairs, Prevents Scratches - Amazon.com
Scotch™ Caster Cups, Hard Plastic | 3M United States
Sunxeke Bed Stoppers & Furniture Cups Caster Cups - Premium Silicone Casters Wheel Stoppers Fit All Wheels of Furniture, Sofa Bed Chairs-Furniture Stoppers to Prevent Sliding (4Pcs Black) - Amazon.com
Slide Stop Castors Cups- Floor Protection Cups for Castors