Profile Female Titanium 10mm Bolts 3/8" (10mm) axle bolts for Profile Elite, Mini, Totem, Elite MTB bolt-on, & True 3/8" Fixed hubs. These bolts are also compatible with Madera 3/8" hubs. They do not include the aluminum Volcano bolt covers & a steel washer. Sold as a set (2 Total). 3/8'' x 16 threading on each bolt.