Amazon.com: Bond Repair Treatment Starter Kit | Damage 。Zerran APS Specialist Kit gives you the best quality tools to get amazing results! Includes: 1-APS Bond Amplifier No. 4, 16 oz. 2-APS Bond Completion No. 2, 16 oz. Restore and strengthen damaged hair with the Zerran Hair Care APS Specialist Kit, a professional-grade duo designed to repair and protect. This comprehensive system pairs Bond Amplifier No. 4 with Bond Completion No. 2, working together to rebuild broken bonds and seal the hair cuticle for lasting resilience. Each 16 oz. bottle delivers concentrated treatment that transforms compromised strands into visibly healthier, stronger hair. Perfect for stylists and at-home users seeking salon-quality results, this specialist kit tackles the root cause of damage while enhancing shine and manageability. Experience the difference professional bond-building technology makes.