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This Tourne-Mobile suspends heavy mobiles up to 800 g. They can be installed in front of large windows (mind the inclination of the sun), and are recommended for artificial skylights and ceiling.
PIECES: 1 v 0.5 engine block of wood, with 1 horizontal solar cell 0.5 V 500 mA Max.
SIZE: 8 x 8 cm + length of thread 20 cm
SPEED: your choice in the options below
SLOW (17 rev / min)
or FAST (60 rev / min)