Magnetic Boat Prop Balancer Nitro EP FE Gas RC Propeller Orange Anodised Alloy 3792769822128 | eBay
Aluminum magnetic prop propeller balancer for nitro gas electric rc boat 2mm/3mm/3.175(1/8")/ 4mm/4.76(3/16")/5mm/6.35(1/4")|Parts & Accessories| - AliExpress