25MM RED STANDOFF INSULATOR
HEIGHT:25MM; DIA.: 30MM M6 SCREW; 9MM DEPTH
This Product is great for mounting computers and other item to take out vibration and hard hits.
also works with Coolers and radios. 
other sizes also available
 
This one M6 screws/ 9mm depth 25mm 30mm 
Others available 
M8 screws/ 11mm depth 30mm 32mm
M8 screws/ 11mm depth 35mm 32mm
M8 screws/ 11mm depth 40mm 40mm