Lightweight 3mm thick vacuum formed ABS-plastic pan with polyurethane foam padding only. No upholstry. Perfect for the Do It Yourselfers. A direct bolt-on replacement for the stock Forty-Eight's solo, but lower and sleeker than the stock solo seat. No drilling or relocating the ECU module. Note: Relocating the threaded insert on the rear fender may be required, otherwise a bolt-on application., 10-20 XL