Self-assembled Steam Toys: 220 accessories 3 in 1 function free conversion work head: grip, grab, suction cup Working principle: hydraulic power principle, no battery and motor, as long as water can drive the robot arm Product size: 46 * 26 * 30cm (after assembly) Packaging size: 40.5 * 10.5 * 29.5cm Specifications: 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 Moving Powered By Water, The Hydrobot Arm’S Are Controlled With Hydraulic Plungers With 6 Different Axes, The Arm Can Rotate Up To 270 Degrees From The Base Package Included: Hydraulic robot arm * 1 set