Here's a versatile submarine mini-motor from Tamiya. One AAA battery is required, sold separately. Water-resistant double-sided tape, sandpaper, a styrene suction cap, and a sticker are included. 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.