Color:

Two-layer narrow type without wheels (white)

Two-layer wide without wheels (white)

Three-layer narrow-with wheels (white)

Three-layer wide-with wheels (white)

Three-layer wide-with wheels (black)

Four-layer narrow-with wheels (white)

Four-layer wide-with wheels (white)

Four-layer wide-with wheels (black)

Three-layer narrow-with wheels (black)

Four-layer narrow-with wheels (black)