Includes 4 friction discs. Sold as set. Red Eagle material bonded onto a lightweight backing plate. Red Eagle is standard replacement clutch friction plate set that offer excellent quality, heat resistance and endurance for a reasonable price for stock style motorcycles. Red Eagle is Alto's the best sold clutch material for a reason, just ask anyone who has worked with or has ridden a bike in which a set of these Alto clutch plates were installed. OEM replacement reference 37930-41 (2481-41)