Size is about M14 x 1.5mm. Reusable oil drain plug for routine maintenance and oil changes. Advantages and Benefits: CNC precision machining, premium stainless steel materials and magnets can withstand more than 2.2 pounds and operate at temperatures of 150 degrees Celsius or 302 degrees Fahrenheit for a long time. The magnet pulls away tiny metal particles that the oil filter can't catch. The filter is designed to capture particles larger than 35 microns, and our plug can capture finer particles that the filter cannot capture. It also trap larger metal shavings that clog oil filters. Color: silver Material: metal Package Contents: 1 x stainless steel oil drain plug 5 x copper washers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.