Luff ropes finished with Facnor lightweight aluminum thimbles fit the exact inside dimension of the jaw on the furler for a clean finish at the tack and head. The thimble and luff rope quickly transfer the furling action from the drum to the luff for tight and even furling.
Facnor thimbles are CNC machined from a solid block of aluminum so they resist crushing under high loads. Consult with your sailmaker to find the best luff rope configuration for your boat. However, you can be sure that Facnor makes thimbles that will suit your needs.