Smooth limit plug gauge called smooth plug, plug glossy, smooth limit plug gauge size 3MM-350MM. Smooth bore more than 100 more than the amount of regulation can be made into a single head imperfecta type plug-type stopper plate and sheet form factors the aim is to reduce over the weight limit plug gauge smooth material specifications mainly through artificial hardened bearing steel with a hardness GCR15 reach 58-62 degrees, wear accuracy up plans to build national standards can be shaped smooth bore gauges; Our company fully advantage of years of experience in design and production, optimize the product mix, seek variety, quality Stable. Enterprise autonomy has improved detection capabilities, based on user requirements and design drainage, HVAC special structural aspects of various products. My company has a strong productivity and competitiveness of the industry, the factory has a threaded plug manufacturing department, manufacturing department threaded ring, smooth plug Manufacturing Manufacturing smooth ring, thread gauges manufacturing department. Our products are widely used in the oil, chemical, coal, power plants, research, shipbuilding, environmental protection, construction, machinery, metallurgy, fertilizer, paper, energy, biomedical, refrigeration, food, beverage, pharmaceutical, hospital, precision electronics, fine chemicals, electricity, painting surface cleaning and other areas and other industries.