Hydraulic Robot Arm 3 In 1

Description

You don't need a battery,you dont need a motor, just water can drive your mehanical arm! - The pressure of water is converted into power, so that the operating lrver can easily control various joint activities of the mechanical arm. - The mechanical arm is constructed by 220 components,which trains childrens logical ability and practical ability and explores scientific principles. - The mechanical arm has three functional modes: Clamp,suction cup and hydrauilc grab. - Give full play to your imagination and feel the fun brought by the hydraulic mechanical arm.