Dimensions and weight: Drum measures 4 inches high by 6 inches diameter (10 cm x 15 cm) and weighs 19 oz (540 grams).
Optokinetic Drum
Product Number: 15360
Purchase the Optokinetic Drum from Gulden. OKN Drums create a nystagmus in normal patients when rotated at 8-10 rpm. The drum rotates on ball bearings so it is very easy to spin.
$140.00