Plastic Castor Blocks and Single Wheel Castors, Plastic Castor Block Sets, Plastic Single Wheel Castors, Plastic Cupboard Castors, Castor Corner Mouldings, Plastic Castor Corners and Nylon Castors designed for use in the assembly or Wooden Frames and Carcasses. Whilst these Components aren't exclusive to each other, we can't guarantee that our Blocks or our Castors, will function with products outside of this category, so if you're in any doubt we'd advise you try before you buy.