Features:
OOTDTY  
This speed test disk is specially designed to detect the rotation speed of for LP vinyl record.
45 (inner rings) and 33 (outer rings),two speed gear are suitable for most phonographs on market;
Made of acrylic material, it is durable, reliable, high quality and high
It can test whether the speed of the turntables is accurate, debugs the overshoot of the cartridge.
It is an indispensable debugging tool for playing for LP vinyl record players.

Specifications:
Material:Acrylic
Color:White
Diameter:Approx.80mm/3.15in
Thickness:Approx.7.5mm/0.3in

Package Includes:
1x for LP Vinyl Phono Speed Test Disk

Note:
Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order.
Due to the difference between different monitors, the picture may not reflect the actual color of the item.