These are a billet anodized aluminum tie rod that will fit on most European made karts. It is a hexagonal shape for easier adjustments.
Lengths are measured in mm. Don't have a caliper tool or metric measuring tape? To convert inches to mm. just take the length and times it by 25.4. For instance: (8.25 inches x 25.4 = 209.55 - order a 210mm tie rod)
Every chassis model has different lengths of tie rods. Some chassis models use different lengths from the left hand and the right hand. So please measure both tie rods before ordering.