Self adhesive, easy to fit. Complete with fitting instructions. Improves your sailing performance:When a sail is trimmed correctly all Tell-Tales on both sides will stream aft. If pointing too high or the sail needs trimming, the windward Tell-Tales will flutter and lift; if sailing too low or the sail is trimmed too tight, the leeward Tell-Tales will lift.• When sailing a fixed course, trim the headsail to the Tell-Tales; when sailing on the wind, steer the boat according to the Tell-Tales.• To check the fore and aft position of the sheet fairlead, sail close hauled and all the Tell-Tales should stream or lift together. If the fairlead is too far aft, the highest windward or lowest leeward Tell-Tales will lift. If the fairlead is too far forward, the highest leeward or lowest windward Tell-Tales will lift.
