IMPLANT SILICONE - Durable Silicone bearing cover. - Anodized black 6061 Aluminum compression wedge. - (2x) 45x45 degrees Campy-type precision sealed cartridge bearings. - 6061 Aluminum and Steel crown races included. - Offered in Dark Blue, Gang Green, Glow in the Dark, Neon Orange, Neon Pink, Purple, Red & Limited editions. - Embossed Stolen logos molded directly into the silicone cover. - Low profile 23mm stack height for a clean look. - Weight: 2.1oz.