Pack of Five Brake Loaded Castors These Brake Loaded Castors lock when you put your weight on the seat, before becoming mobile again once the pressure is lifted off, for an adaptable & robust mobile castor base for your office chair. SKU: ACC4ALL Pack of 5 castors Suitable for office chairs supplied by Andrews Office Furniture 11mm-thick spindle, which slots into base of chair Non-returnable Castors lock when you are seated Please ensure these castors fit your chair before purchasing 4 weeks delivery time Call us on 0800 559 3917, or visit our showrooms in London, Essex, or Northampton, for further information!