125mm Polyurethane Swivel Casters with Brakes - Top Plate Fitting Heavy Duty PU Casters Wheels by Bulldog Castors - Max 500Kg Per Set

I used these castors for a multi function trolley i made, there very good to manoeuvre and they are very sturdy i have given it a 4 star because of the price they are a bit pricey but quality castors.