1) quality products. 2) Perfect match with the product. 3) Made of high quality materials. 4) Easy installation and use. 5) Stable characteristics, high reliability. Name:Position Sensor Applicable to: 32-inch sprockets. Dimensions: Mounting screw hole center distance is 50mm, circuit board length is 60mm, width is 42mm. Note: When installing the sensor, be careful to the sensor does not rub against the sprocket when the shaft rotates. Colour:As Shown Material:plastic Package Contents: 1 x Position Sensor Only the above package content, other products are not included. Note: Light reflection 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.