sorry i bought the machine from ebay ,this is the link

http://cgi.ebay.co.uk/17-x-15-3D-cnc-router-engraving-machines-/160481522086?pt=UK_BOI_Building_Materials_Supplies_Carpentry_Woodwork_ET&hash=item255d71b1a6 ...... Linear bearings, can be adjusted to ensure the elimination of the gap,

precision fit,

high-precision linear Round rails, diameter 0.8-inch,

The use of high-precision new ball screw,

there is no rebound in return; diameter 16 mm; pitch 10 mm;

Aluminum alloy T-slot table, Can help you cut and fixed,

Manufacture than wood table has a huge advantage,

NEMA23 stepper motor current is 3A, the weight 2.2 pounds ,Torque 1.7n.m 245 oz.In.

30v 3A CNC drive,tb6560 , Optical isolation, the maximum 1 / 16 micro-step,Spindle control relay

400w 30v Switching Power Supply

spindle motor is 850w, 4 level speed, 5000--30000RPM, Strong power;

milling tool diameter: 8mm,6mm,3.175mm

Router is the length of 28 inches, width

thanks for your answer