Manoeuvrability of wheels and castors

Four swivel castors, can be provided with directional lock if required
Four swivel castors, can be provided with directional lock if required
Four fixed castors, the middle fixed castors have a little more overall height
Four fixed castors, the middle fixed castors have a little more overall height
Two fixed, two swivel castors
Two fixed, two swivel castors
Four swivel, two fixed castors
Four swivel, two fixed castors
Two swivel, two fixed castors
Two swivel, two fixed castors
Three swivel castors
Three swivel castors