Affordable doesn't have to mean cheap or unreliable and Mission are consistently proving this with their expansive range of quality, yet afforadable parts. The Mission Nexus Sprocket is CNC machined from 6061 aluminium and 5mm thick to get the balance between strength, durability and weight as right as possible. ###section### Product Specs TYPE: Bolt On MATERIAL: Alloy WEIGHT: 120g (4.22oz) Colour: Oil Slick, Black, Gold, Red, Silver, Purple; Size: 28T, 25T