With their clean, subtle lines, the hollow office-chair castors in the E65U series exude elegance. Yet they are also functional and robust. The castors are available in a plain version as well with two different braking systems. Here, it has been managed to integrate the braking systems without compromising on the uniform appearance of the series. The linchpin is located within a centrally located bushing. The durability of the castors results from the two bearings positioned on the sides of the wheel caps. These bearings also give the castors a pleasant running smoothness.