DescriptionAre you looking for a professional, yet affordable tubeless bike stem? Are you in search of a sturdy, trustworthy tool that can do multiple jobs? If yes, look no further! Our professional stems must meet your needs. It is one of the best choices for you.Features- Color: Assorted color.- Size: 2.60X0.40X0.40cm/1.02X0.16X0.16 inch.- Material: Brass, alloy.- Each package includes 6 pieces of Presta cores and 1pc tool, large quantity enough for your bicycles, they are good bicycles necessities.- Premium brass and alloy material is durable and safe to use.- The product is designed with good texture and fine workmanship, very practical.- The core is easy to install and disassemble, convenient to use.- Equipped with installation tools, it is more convenient to use.Packing list: 6 x cores1 x tool