Product DescriptionHigh speed internal combustion engine modelHigh speed internal combustion engine model Model No.:High speed internal combustion engine model Brand:MYC and so on.Types: OPEN, ZZ, 2RS, N, NR, ZN, RZNMaterial:Chrome Steel, Carbon Steel, Stainless Steel, Plastic, CeramicPrecision:ABEC-1, ABEC-2, ABEC-3, ABEC-5, ABEC-7, ABEC-9,..