Razor RipStik DLX Caster Board (also known as a waveboard and vigorboard).
Measures 33" long x 8.75" wide.
Colors are Red, Black & Silver.
Good used condition - only used one summer: scuffs/scrapes on edges from normal use, no chips or cracks.

Similar to a skateboard, but has two wheels instead of four, and the rider presses on the left and right sides of the RipStik to twist the deck using heels and toes, with help from hips and shoulders, to propel it rather than pushing against the ground.