Comes with a 10cm replacement nozzle Dimensions: 145mm x mm x 12 85mm (L x W x H) (approx) for garage workshop, metallurgists, builders, auto mechanics, graffiti artists and DIY Professional manufactured and designed for efficient use of air blowing, cleaning parts and surfaces This refractometer is the design according to the principle that different liquid concentrations have different refractive index, with fast and accurate characteristics