Tamiya Pulley Unit Set Educational Series

This is a Pulley-block Unit Set for Different Designs.
    It's from Tamiya for very skilled model builders.

FEATURES:
Sheave set is designed to attach to a picked model package such as a
    jumping dophin, an elevator, a moving pet dog, alligator, or revolving
    bird cage.
Contains white, black, and gray plastic parts connected to sprues.
Other parts include an electric motor, belt guides, skinny belts,
    circular wheels, rivets, a base, and motor holder.
Battery operated.
Small phillips screws for solid construction.
Structure of sheave is kept simple for upkeep functions like
    changing the belt, if needed.
Pulley turns freely, permitting a pet to wag his tail, an alligator
    to open his mouth, or a dolphin to "leap" into the water, among
    other chosen motions.
Designed for relatively small and simple models.
Reverse rotation of sheave is possible.
Pictorial directions included.

INCLUDES:
One Sheave Unit Set

REQUIRES:
Assembly
Battery
Small Phillips Screwdriver
Modeling Knife
Sprue Cutters
Long Nose Pliers

SPECS:
Base: Length: 4-3/4" (12.3cm)
Width: from 1/2" to 1" (1.5cm to 2.5cm)
Height: 1/4" (7mm)

REMARKS:
Stay out of reach of children. Consists of small parts.
Instructions and box language written in Japanese and English.