To create your own automatic spinnaker pole system on your dinghy, use the spinnaker pole ball to attach to the spinnaker pole. The counterpart is the spiro on the mast. Suitable for: - 420 - 445 - 470 - 485 - 490 - 505 - Flying Dutchman - Fireball - Koralle - Korsar - Marauder - Open 5.00 - Open 5.70 - Pirat - Ponant - Vaurien - Windy