Assorted Plastic Twin Gear SetsContains 2 each of 10 different plastic twin gears. Suitable for hobby, model, science and other projects. Shaft hole diameter 1.9 mm. Click on picture for detailed view. SVM104 - $8.95 | Assorted Plastic Pulley WheelsContains 2 each of 5 different plastic pulley wheels. Suitable for hobby, model, science and other projects. Shaft hole diameter 1.9 mm. Click on picture for detailed view. SVM201 - $5.95 | Assorted Plastic Pulley WheelsContains 2 each of 5 different plastic pulley wheels. Suitable for hobby, model, science and other projects. Shaft hole diameter 1.9 mm. Click on picture for detailed view. SVM202 - $5.95 |