Contact Type: NO; Action Type: Momentary; Rating: 125VAC 1A; Terminal Type: 3-Pin Terminals. Size: 18mm x 27mm x 14mm (L x W x H); Mounting Hole Dia.: 3.0mm. These mini switches features NO contact, momentary action and come with 1m 3-pin cables. The limit switches kit is compatible with 3018-PROver/3018-MX3/3018-PROVer Mach3. Easy installation and long service life. It's a perfect upgraded accessory for CNC without a limit switch. Colour: black Material: plastic Package Contents: 6 x Limit Switches 6 x Cables 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.