We have produced this version following requests from customers - some of whom have been using two of our original Silicone mats one on top of the other, and would recommend it for non suspended sub-chassis turntables. It works great on glass, acrylic and alloy platters and is superb on direct drive decks. Manufactured in 3mm dark grey silicone, this mat is not like old style hard rubber mats - silicone is very pliable and 'floppy', so it almost clings to the platter and LP surface, giving great damping where it's most needed. One side of the mat is very smooth and this is the side to use upward in the majority of cases, as dust will not cling to it. The other side is not quite so smooth and almost 'sticky' so it really gives maximum damping if you use it with this side against the record. It does sound different whichever way you use it, so you can try it both ways and decide for yourself. Diameter is 295mm and weight is 270g. The Silicone mat can be washed in warm soapy water periodically without harming it at all. We have sold over 1000 of our original 2mm Silicone mats, and all the feedback has been very positive. They are currently in use on: LP12, Axis, Basik, VPI, Mantra, AR, Thorens, NAD, Garrard, Dual, Logic, Rega, Pro-Ject, Roksan, Systemdek, Technics, Micro Seiki, Pink Triangle & many others. If you are buying one of these, you may wish to consider also buying our 'Revolution' Soft Clamp. This is a Record & Spindle Damping Device which compliments the silicone mat perfectly - indeed many customers using the mat are also using the 'Revolution'. If you buy this at the same time, there is no additional postage to pay. The mat is shipped in a strong cardboard LP mailer, so it will reach you in the same perfect condition that it left us.