SON Rear Light for seatpost mount <li>Elegant fitting on a seatpost with tensioning strap and tensioning nut</li> <li>Tensioning tool included in delivery</li> <li>For seatposts-ø 26 up to 31.8 mm</li> <li>SON Coaxial Cable 190 cm (fixed inside the housing, bare ends, connectors separately enclosed)</li> <li>Conforms with German legal regulations / ISO 6742</li> <li>Weight (w/o cable): 35 g</li>