Turntables > Turntable Tools > KeyStrobe Reference Standard Turntable Stroboscopic Disc

A rigid plastic disc in white with black markings

- Printed with 50Hz markings on one side & 60 Hz on reverse side

- At 100mm diameter, the disc can be placed on top of a record label for accurate speed calibration with stylus drag taken into account

- Bands for 33rpm & 45rpm