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Die cast aluminium, with plated brass inserts, accepts articles upto 70 mm diam, rubber covered jaws.

An electric motor rotates a drum in 15 minutes. The drum consists of a cork table to which germinating seedlings are pinned and has a prespex cover 105 x 100 mm (height x dia). A stand enables the angle of the cork table to be set at any desired inclination. Works on 240 V AC.

A set of two models, one dissectable into two parts, showing the anatomy of cockroach, alimentary canal regions, salivary glands, reproductive organs, nervous system etc. The other model shows the ventral structure with detachable mouth parts, wings and appendages, with key card.

For use on double ‘C’ core, wound with 1,100 turns of 22 swg copper wire with a resistance of about 6 ohms and inductance of about 15 henries, size 100 x 60 x 55 mm approx.

Hand held, all colors are blended on spinning the wheel size 22.8 cm diameter approx.