Jib Hank Twist-On Type For Up To 3.5mm Wire Plastic Each

Hi Tim They should work with your boat, I'm intrigued why the luff is so thick at 5mm though. Normally on a GP14 the jib has a wire luff and the boats rig tension is applied through the jib halyard and the forestay is only really there to stop the mast falling down when the sail isn't there. If you have any further questions it may be easier to send a photo or two and give us a call Regards David