Dimensions: Including 1 inch, 3/4 inch (6 points), 1/2 inch (4 points), 3/8 inch (3 points), etc. Standards: The design and manufacture of plugs usually follow international standards such as ISO, ANSI, DIN, as well as regional or national standards. Materials: Plugs can be made from a variety of materials, including but not limited to carbon steel, stainless steel, brass, plastic, etc., to meet different working environments and media.

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