This item is a educational construction kit assembled from various materials (plastic, metal, etc.).
Full steam ahead! Here's a versatile submarine mini-motor from the fine folks at Tamiya. Includes everything needed to build the submarine motor as shown below. One AAA battery is required, sold separately. The suction cup attachment device lets you hook the motor up to almost any water-going model! This set includes two slabs of easily shaped styrofoam, each measuring 17 x 10 x 0.6cm. Ships not included! A million and one uses!