Plastic Gear Set With Bushings (4 Gears Plus 3 Bushings)Product Details:Gears For The Science Fair Or For Your Hobby Projects.Set Consist of (3) Combination Spur / Beveled Gears, (1)Small Spur Gear Plus (3) BushingsCombination Spur / Beveled Gears Can Be Used Either Straight or 90 Degree to One AnotherAvailable in all Red, Green, or Blue Plastic (We’ll Pick The Color)The Combo-Beveled Gears Are 1-5/8″, 1-1/4″ and 27/32″ Diameter With 3/16″ Bores to Accept the Bushings, Which Are: 3/16″ OD, 3/32″ IDThe Straight Gear is 17/32″ Diameter With a 1/16″ Half-boreAll Are 24 PitchUNK92657