The SSD SCX10 III HD Brass Straight Axle Differential Cover is a CNC machined brass option that adds 30 grams of weight to the front or rear axle. The scale design slides over rocks better than the stock part and is a direct fit on the SCX10 III straight axle case. Note: These will not fit SCX10 III portal axle case. Features: CNC machined brass Scale realistic design Gun metal grey color Designed to slide over rocks better Direct fit onto stock SCX10 III straight axle case Weight: 30g Includes: (1) Brass diff cover & mounting hardware