Description:Self-assembled Steam Toys: 220 accessories3 in 1 function free conversion work head: grip, grab, suction cupWorking principle: hydraulic power principle, no battery and motor, as long as water can drive the robot armProduct size: 46 * 26 * 30cm (after assembly)Packaging size: 40.5 * 10.5 * 29.5cmSpecifications:The Hydrobot Arm Kit Lever Allows Builders To Move, Grip, And Even A Suction Cup Different Objects Kids Can Easily Switch Between Grippers Or Suction Cups, Depending On The Object They Are MovingPowered By Water, The Hydrobot ArmS Are Controlled With Hydraulic PlungersWith 6 Different Axes, The Arm Can Rotate Up To 270 Degrees From The BasePackage Included:Hydraulic robot arm * 1 set