BR-12 is a vibration-damping butyl rubber sheet
that takes its tapered shape and tuning hole layout after MJ-12, Pyaide's aluminum turntable sheet.
With high-friction butyl rubber it has great grip and great contact to vynl disc to avoid slip
even when its used with high pressure stylus.
From center to perimeter, it has a taper of 1.0 degree elevated angle.
It will correct vynl disc's warpage by the rubber sheet tightly sticking to it.
Then stylus movement will get stable to trace the groove.
The tapered sheet has 18 tuning holes, it contributes more to improve sound quality.
The holes work also as finger rest when removing 10inch or EP discs.
Its diameter has been made 294mm to make it easy to remove LP disc(300mm).
Thickness is made 5mm , same as to most of the turntable matts that come with record players,
it does not require height adjustment of tone arm when you replace it.
Overhang gauge comes with PP coated paper stroboscope and help you to adjust your record player.