Specification: Glowplug T-P3 Exhaust seal musical organization Dust restriction set (18mm/16mm/3mm) Carburettor 6mm, 7mm Displacement: 3.49cc (0.213cu.in) Bore: 16.27mm (0.64in.) Stroke: 16.8mm (0.66in.) Practical r.p.m. range: 4000~40000r.p.m. Manufacturing: 2.6ps/34000r.p.m. Weight: 355g (12.52oz.)