Features:<br />Material: Plastic<br />Size: 6*8mm; <br />        6*6mm<br />Modulus: 0.5<br /><br />Features:<br />- Best used for optical axis， car axle whose optical axis is 2mm<br />- Application: Gearbox， Capstan， Deceleration pattern in bar<br /><br />Package included:<br />10 x Gears