55.5mm Plastic Gear 85 Teeth (102A) 257 Rectangle Diffused Blue Colour LED It's an 8-Bit CMOS Microcontroller

It's an 8-Bit CMOS Microcontroller with nano-Watt Technology

MQ-8 hydrogen gas sensor of high sensitivity

and LCD monitor

Eliminates factory calibration of the proximity sensor

55.5mm Plastic Gear 85 Teeth (102A) 257 Rectangle Diffused Blue Colour LED It's an 8-Bit CMOS MicrocontrollerThis gear has 85 teeth and an outer diameter of 55. 5 mm. It has a 6. 2 mm diameter central hole. Fits all of our 6. 2 mm axles perfectly. This is a high quality plastic piece of equipment. Use it to get your motor to run at the desired speed and torque. It comes with a set screw that allows it to be easily attached to various diameter motors and axles. Specification Material Plastic gear with a metal shaft Outer Diameter 55. 5mm Number of Teeth 85