Unused plastic gear. Great for experiments/projects. 0.7" diameter with 35 teeth, inside is 1/4" diameter with 10 teeth. This plastic gear has 2 posts instead of holes. The one post is .096" in diameter by 0.125" long and the other post is 0.1195" by 0.125" long. The gear is 0.626" thick. Unused. Buy in quantity and save!