... RC-MTB-20C Specifications:1.Toray T700 carbon fiber, 700c full carbon rim 2.20mm clincher 3.3k.12k,or ud with glossy coating ... for all of our products and lifetime maintainance. 4.The carbon fiber material is 100% imported from Toray ,Japan. 5.We ... of our engineers have more than ten years experience in carbon fiber field.Product Show: 29er, Clincher carbon fiber bicycle rims,matte finish or glossy