MATERIAL: Made of thick 304 stainless steel, strong and durable, high strength, not easy to rust, anti-moisture, anti-oxiclation, corrosion resistant,washers are red copper. SIZE: Thread Size: M18, length 12mm/0.47in. ADVANTAGE - Comes with a sealing ring for tight sealing. Use for replacement of sensors and industrial pipes, garden, swimming pool water pipe ends, etc. in automobiles, motorcycles and ships. NOTE: Before placing an order, please make sure that the M18 pitch 1.5 is suitable. MATERIAL: Made of thick 304 stainless steel, strong and durable, high strength, not easy to rust, anti-moisture, anti-oxiclation, corrosion resistant, washers are red copper. SIZE: Thread Size: M18, length 12mm/0.47in. ADVANTAGE - Comes with a sealing ring for tight sealing. Use for replacement of sensors and industrial pipes, garden, swimming pool water pipe ends, etc. in automobiles, motorcycles and ships. NOTE: Before placing an order, please make sure that the M18 pitch 1.5 is suitable. NOTE: Due to the difference between different monitors, the picture may not reflect the actual color of the item. CUSTOMERS SERVICE: We will support lifetime garrantee and 100% money back for your problem, in addition, we offer 24H always online service, welcome to come to us if you need help.