Specifications: Displacement: 9.95cc(0.607cu.in) Bore: 24.0mm(0.945in.) Stroke: 22.0mm(0.866in.) Output: 1.9ps/16,000r.p.m. Practical r.p.m.Range: 2,000-17,000r.p.m. Weight: 550g(19.42oz.)