The Carbon Express Photon 5mm Carbon Arrow Shafts deliver precision straightness tolernace of 0.002" max for dependable shot accuracy. The 32" shaft length allows for compatibility across a variety of bow setups. FeaturesSmall diameter arrow shaft with a .203" inside diameter for deeper penetration and reduced wind driftAvailable spine options: 400 spine (7.2 GPI), 350 spine (8.1 GPI), and 300 spine (8.9 GPI)Includes a 32 grain sleeved in-outsert system for added front-end durabilityFletched arrow option features Q2i 2" Rapt-X Vanes for stable flight and improved control12-pack bare shafts for custom builds