This range of standard pre-made halyards has been designed to make replacing halyards on your sailing boat quick and simple. They come in three standard colours: grey, navy blue and red. This is a performance specification for a 1:1 main halyard made from Powersprint, from Italian rope makers Gottifredi Maffioli, with an SK78 Dyneema® core and durable polyester cover. At the cockpit end, it is finished with a Flemish eye (to simplify running halyards through the mast) and at the working end it has a covered eye splice plus a 6mm soft shackle, for connection to your mainsail. This 12mm diameter x 45m long halyard is recommended for use on masts with a “P” measurement of between 16 – 18m. However, due to variations in cockpit setups, we suggest you double check the appropriate length for your own boat. We use the following formulae for 1:1 main halyard length: 2.1 * P + [distance from boom to deck] + [distance from mast to halyard winch] + 2m It is better to have a halyard 2-3m too long than too short!