The Shimano Ultegra ST-R8150 12 Speed Rim brake Di2 Shifters are high-quality and lightweight aluminium shifters designed specifically for road bikes. With a sleek black colour and compatibility with Shimano brands, these drop bar shifters offer precise and smooth gear changes. The set includes both the front and rear shifters, making them ideal for riders looking for a reliable and durable brake/shifter combo for their bike. At just 100-199g in weight, they provide a good balance of performance and efficiency for cyclists.