Size:Total Length: 22.5mm / 0.89"Inner Length: 21mm / 0.83"bayo-net Length: 18.5mm / 0.73"Easy to install and easy to use.Made of Nickel-plated Manganese Steel, good-looking and long life expectancy.Thread mounting, stable and easy to install, 4mm thread diameter.Widely used in home electric appliance, office and industry.
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