Width: 6.1 inches (155 mm); Length: 10.0 inches (255 The rail is fixed in the rear end of the saddle, freeing the area of ​​the body on which the ischial bones and perineal areas rest, limiting pressure to a minimum. Primary Color:Black Superflow central hole to ensure maximum comfort and relieve pressure from the perineal area. Rail longer than 10 mm for greater travel in the adjustment of the saddle. Rail Material: FeC Alloy (0.3 inch (7 mm)); Top Material: SOFT-TEK Cut Out:Yes