The Ergo is the core of our new family of fit and comfort focused armrests. It offers a smoothly curved shape designed to comfortably cup the elbows while providing good support and control. The bolt pattern yields 48 possible configurations just by moving the armrest. The Ergo is compatible with all current aerobars and earlier models that used the F-19, F-22, F-35 or F-40 armrests. - Armrest Construction: Injected Nylon/Glass Fiber - Pad Construction: EVA foam with anti-bacterial/anti-microbial Lycra cover - Pad Model: 10mm - Color: Matte Black - Hardware: M6 x 10 FHB - Weight: 145g/pair