4Pcs Furniture Risers 3.3" Heavy Duty Bed Risers Adjustable Sofa Chair Risers

STRONG AND ERGONOMIC: Made from durable, strong, heavy-duty plastic, these adjustable furniture risers can withstand up to 500kg (1102lbs) in weight without cracking under pressure. Each one has a non-slip felt pad on the base, protecting your hardwood, ceramic tile or linoleum floors.

eBay