Topstar castors 6990-7 are specially designed for use on hard floors and offer a reliable solution for office chairs. These castors are made of robust plastic and ensure smooth and quiet movement on various surfaces without damaging them. With a diameter of 65 mm and a width of 65 mm, they are ideal for most common office chairs. The set includes five castors that offer a simple and practical way to improve the mobility of your office furniture. The black colour scheme blends harmoniously into any office environment and ensures a professional appearance. These castors are not height-adjustable, but provide a stable and secure base for your chair.