Screw threaded hexagon stand-off spacers of male to female type, with black nylon construction. Threaded spacers are used to stack or mount printed circuit boards and machine boards. A standoffs spacer is used to keep the motherboard above the case, prevents motherboard from shorting out and helps cooling. Package Contents:400 x Hexagon Standoff Spacers Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Product Name : Hexagon Standoff Spacer;Thread Size : M3 Male Thread Length : 6mm/0.24 inch ;Hex Part Length : 8mm/0.3 inch Total Size : 14 x 5.5mm/0.55 inch x 0.22 inch (L*D);Material : Nylon Color : Black;Net Weight : 26g