Description: Made of High Quality Metal and Magnet. Magnetic drain plug is to help keep harmful metal shaving out of your engine. Trapping contaminants and metallic particles that do the most harm. With magnet oil drain sump plug, trap the smaller nano particles that don't get filtered. When it comes time to change your oil just clean off the magnetic end and reused it. Specification: Material: Metal Size: Approx 36*20*20mm Thread Size: M12x1.25mm Package Includes: 1 Piece Magnetic Oil Drain Plug Bolt 1 Piece Screw Ring Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making payment. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you