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Specifications: Material: 7075 T6 aluminum alloy Shape: Round / Oval Size: 32T, 34T, 36T, 38T Compatibility: 7/8/9/10/11/12 speed BCD: 104BCD Finish: CNC machined Weight: 41g(32t)/49g(34t)/59g(36t)/72g(38t) Feature: 1. The new narrow-wide teeth design increases chain retention, wear life, and reduces friction and noise. 2. Super durable and light weight 3. Easy to install and fits perfectly the 104mm bolt pattern. 4. Package include: 1 x 104BCD narrow wide chainring. Please determine your crank BCD specification carefully before buying.