Get your Ae-ron seat back in working order with this two-pack of replacement wheel arm bolts. These black knob wheel arm bolts Compatible with Herman Miller Aeron seats ensure a precise fit and reliable function. Installing these replacement parts helps extend the life of your high-end office chair and helps maintain the smooth adjustable function of your seat's armrests, allowing you to customize your seating position for optimal comfort. Ideal for replacing your worn or damaged armrest adjustment bolts. Please note that these bolts are not compatible with lever chair models