5Dev Oval T-Type 3-Bolt Chainrings. Features: Oval shape Machined in San Diego, CA SRAM 3-bolt Direct Mount fitment with 3mm offset for Boost chainlines Works with both SRAM and Shimano 12 speed chains, as well as T-Type May not be compatible with all high pivot bikes Weight: 58g Specs: Model:Oval T-type Ring Type:single (anti-chain drop) Mount:3-bolt DM 3mm offset Teeth:32t Oval Round:oval Color:black