Tamiya Pulley Unit Set Educational Series

This is a Sheave System Set for Different Models.
    It's from Tamiya for really skilled model builders.

FEATURES:
Sheave set is designed to attach to a picked model kit such as a
    leaping 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 electrical motor, belt guides, skinny belts,
    circular pulleys, rivets, a base, and motor holder.
Battery operated.
Small phillips screws for strong construction.
Structure of pulley is kept basic for maintenance purposes like
    changing the belt, if needed.
Pulley turns freely, permitting a canine to wag his tail, an alligator
    to open his mouth, or a dolphin to "leap" into the water, amongst
    other chosen motions.
Designed for fairly small and basic models.
Reverse rotation of pulley is possible.
Pictorial directions included.

INCLUDES:
One Sheave System Set

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

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

COMMENTS:
Keep out of reach of kids. Includes small parts.
Instructions and box language composed in Japanese and English.