Sintrix 440 Blank construction. REC Black pearl recoil guides. Fuji Titanium stripper guides. Fast action blank design. Selected Hard wood and Triaxial carbon spacers. The Hardy Zephrus series of fly rods features our award winning Sintrix material - Sintrix 440.The Zephrus exhibits high recovery and enhanced in hand feel for a fast action rod, whilst generating high line speed and phenomenal line control.