50Pcs 0.5 Modulus Plastic Gear15 Teeth Model C152A 8.5mm/0.33′ Outer Diameter x 2mm/0.08′ Hole x 3.9mm/0.15′ Thickness Pulley Belt Shaft Robot RC Motor Hand DIY Mechanical Parts Kit White

About This Product :

• Modle: Plastic Gears ; Number of teeth: 15 ; Modulus: 0.5 Modulus.
• Outer diameter:8.5mm; Hole diameter: 2mm.
• 100% Brand new and high quality. Good accessories for Vehicle or remote control, Provides a convenient choice for your DIY project.
• Plastic Gears suit for a science DIY project such as rc model car, model electric robot and displaying how gear ratios work, and any other family small motor DIY project.
• This is the most complete gear set. It can meet your DIY needs.