4 x 2" Heavy Duty Swivel Double Wide Castor Wheels Trolley 50mm Furniture Rubber With Brake Laundry The top layer comprise a BW-POOL-PLAY-53172

4 x 2" Heavy Duty Swivel Double Wide Castor Wheels Trolley 50mm Furniture Rubber With Brake Laundry The top layer comprise a BW POOL PLAY 53172 The top layer comprise a cool gel memory foam that dissipates your body heat while you sleep while the middle egg shaped foam layer and bottom high density supportive foam layer work together to provide total body support with pressure relief at all your vital points Kind tips： Lockmaster products may come under a different brand name "UL Tech" but this is still the same product The castors are easy to fit and each comes with a safety brake that ensures once the item is in position storage boxes and anything else that could benefit from a set of wheels