Wilwood's R/H ATV Master Cylinder has a 19mm bore. And is designed for Dot 5 brake fluid. Side mounting with a dimension of 2.29” center to center and a 10mm x 1.0 fluid outlet. Dot 5 versions use seals specially designed for Dot 5 silicone fluid use. Aluminum lid and body construction with a black anodized finish. Wilwood's ATV Master cylinder is available in both L/H and R/H mounting configurations and 19mm bore. Side mounting with a dimension of 2.29” center to center and a 10mm x 1.0 fluid outlet. Dot 5 versions use seals specially designed for Dot 5 silicone fluid use. Aluminum lid and body construction with a black anodized finish.