Today the replacement reels have come to our office chair. The rollers are a great visual impact. The tread is made of gray plastic. The locating pin has a diameter of 10mm and has optimal fit in my chair. The chair is very quiet on our laminate flooring with the new roles. Also I can not imagine that you will be hir additionally need a floor mat as recommended in the instructions to me. For this price I was buying these roles at any time.
