Rare URSR (see http://www.soundfountain.com/amb/ttring.html for details). This is an aluminum/acrylic "sandwich" ring which will work on most turntables due to its relatively light weight. I found it effective on my VPI Scout but have since upgraded to a Scoutmaster (which it is not compatible with due to platter diameter). Here are some size specs:
- The maximum size of the platter should not be greater than 318 mm (12.4906713 inch)
- The distance between spindle and arm base should be at least 170 mm (6.67740288 inch) which is the case with practically all tonearms on the market, except for the Triplanar VII which has uncommon measurements as Doug Deacon found out
- If the turntable is a belt drive with the belt around the periphery of the platter, there should be at least 7 mm (0.274951883 inch) space between top of the mat and the belt. And the same distance between the top of the platter and any other obstacle, knob, motor housing, etc
See the website referenced above for more information on fit as well as some links to reviews. Includes ring, centering disc, and wooden box. Rated 7/10 for light smudges/fine scratches. Of course it looks perfect while spinning! Fed Ex Ground shipping included to Lower 48.