This is a 10,20,30 mm ring, put under your , .

From a practical side, it permits to players to have his hand a little bit in the space. Permits also to thicken the table. It can be in wood.(), , , with or without adjustable 16 million of colors.

At last, it's possible to

This is a from 20 to 30 mm band put on your table , in the armrest. You have to take it but it's free for American rail table which are more of 10 mm, it can have the same treatment as the elevation rail surface.