The internal thread is 1/8 NPT. Necessary M16X1.5 and M12X1.5 adapter replacement. Accessories, after-sales instruments installed on the engine. The oil pressure adapter replaces the transmitter behind the air . finishing, all threads have passed the inspection. Colour: silver Material: aluminum Package Contents: 1 x M12 connector 1 x M16 connector 2 x gasket Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin