The oil-cooled adapter is installed at the heart of the engine and connects the inlet and outlet pipes. The interface wire is 10mm x 1.0mm, and the hollow screw diameter is 8mm. Can be inserted an 8mm tube, larger than the oil section, makes the oil flow without any resistance. Made of high density brass and aluminum alloy, high abrasion resistance and high resistance. Suitable for modifying the / or GY6 motorcycle system. Characteristics: Condition: 100% new Thread: M10 x 1.0mm Hollow screw diameter: 8mm Fitment: for GY6100-125-150cc motorcycle: With an oil filter cap under the engine, 30 x 1.5mm thread Colour: silver Material: metal Size: Thread: 30x1.5mm Package Contents: 1 x Adapter Fitting Only the above package content, other products are not included. Note: Light 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.