Revo ObXidian is E3D's latest abrasion-resistant Revo nozzle specifically designed for printing fiber-filled polymers. Unlike other abrasion-resistant nozzles, ObXidian's copper alloy has a thermal performance similar to brass, making it a true direct replacement. Simply use the same cutter profiles as for your brass nozzles. With wear resistance that is orders of magnitude higher than any other E3D nozzle, ObXidian is truly rugged. Several orders of magnitude harder than Nozzle X and also any other hardened steel nozzle. mouthpiece.