This description is adapted from the manufacturer’s description at http://www.boston-audio.com/mat1.html
Machined from pure carbon and finished by hand, the Mat 1 is a direct replacement for any turntable mat. Through the use of pure carbon and proprietary tuning techniques, the Mat 1 offers a unique acoustical impedance ideally suited to the platter/vinyl interface. It fits perfectly on a LP12 platter, and it has an insert for the record label. The Mat 1 is solid but only 3mm thick. So only slight VTA adjustment, if any, is needed .
Users notice a marked increase in resolution, microdynamics and clarity. Sometimes it’s startling... as if someone turned up the volume. Most important, these gains are not achieved at the expense of a natural, musical presentation - there’s nothing sterile. Music flows more easily with a greater sense of ease and texture.
One owner. Condition is close to as new.
Price includes Paypal. Add $8 for shipping within CONUS. Buyer pays actual cost of shipping elsewhere and for insurance.