MagiDeal Cycling Fixed Gear Bike TT Triathlon Bar End Brake Lever - Black/Silver Material: Aluminum alloy Color: Black/ Silver Size: approx 13 x 8 x 2.5cm / 5.12 x 3.15 x 0.98 inch Fit for handlebar inner diameters between 19mm - 21mm High hardness aluminum alloy construction, durable and wont deform easily