The Custom Brackets Camera Accessory Bars are designed to allow the use of two cameras, or a camera & flash (or other accessory), side by side on a tripod (both 1/4 & 3/8 inch threaded holes are included). Manufactured from black-anodized, aircraft quality aluminium to maximize strength & minimize weight they are available in two sizes, 9 & 14 inches. A cork base pad runs the whole length of the bar, which has both metric & imperial measurement scales & a built in spirit level.