This is a genuine chrome plated Nitto 8mm x 35mm stem bolt. It is extra long to allow a stem-mounted decaleur to be used with most Nitto stems and many other stems. Nitto has made many models of stems over the years, so it wouldn't hurt to measure the one you are replacing; this one is 35mm long, not including the head or about 41mm overall. A matching nut is included. N3x35$2.50 All images and text copyright Velo Orange, LLC 2006, 2007, 2008.