Spi 4 Nub pulley with tie strap for easy spi tack attachment on bowsprits.

• For bowsprit, fixing and adjustment of the strap by lashing in dyneema, tightening by 4 half keys minimum
• Throat pulley for ropes up to 12 mm in pure Dyneema® or with non-aggressive sheath 
• Tack position can be adjusted by means of the Nodus FR14 friction ring