I ordered a master cylinder from a company on the internet, only to receive it to find out the holes to fit the brake pipes were M12 and not M10 like the original. I scoured the internet, and found an M12 to M10 reducing adapter although the prices were ridiculous. But my persistence paid off and came across LPG with this product. Good solid product, with the domed end to make a good fit, where the flared brake pipe end would seal. Very good product !!!