Detailed Product Description RC Helicopter Blade Balancer (3.0mm) Feature: - Diameter : 78mm x 45mm x 72mm - weight: 50g - The usage of Walkera 22E (255mm), Walkera 35,36,37,59,60,68 (288mm), Esky Belt-CP (315mm),Esky Honey Bee (EK1-0202), Align 450 (325mm), Syma 9093 Main Blade Item Included: RC Helicopter Blade Balancing : 1 Set