The silver-colored synchronized wheel is made of high-finish aluminum alloy. When used in combination with a timing belt, it smoothly realizes synchronous transmission and transfer projects. It is widely used in mechanical transmissions such as 3D printers, drilling machines, milling machines, gear machines, and CNC lathes. Package Contents: 1 x Timing Pulley Wheel; 2 x Screws; Teeth: 35; Pitch: 3 mm; Bore Diameter: 16 mm; Maximum Diameter: 35 mm; Total Height: 19 mm; Slot Width: 16 mm; Shaft Hole Shape: Round The transmission is accurate and stable, highly efficient, and has the functions of no slippage during operation, buffering and damping, low noise, convenient maintenance, and lubrication. It has a wide transmission range. It can be used for long-distance transmission. There are two 90-degree countersunk screw holes on the tooth surface, which can be fixed by tightening the screws. K668 D YPM ① 3 ❤️ Although it is a new, unused item, please refrain from purchasing if you are concerned, as it has been stored at home by a private individual. ❤️ I am selling items that I bought and liked but didn't use because I took too good care of them, or items that I no longer need (decluttering). ❤️ Packaging will use recycled materials. ❤️ To sell at a lower price, I will ship without the outer box. ❤️ If you have any issues, please consult with me before leaving a review.