58 styles Plastic All Module 05 Robot Parts Reduction Gear Bag Toothed Wheels WSFS Gears DIY Motor Gear Acceorie Brand new with high qualityMaterial:PlasticProduct model:58 gear packages (58 different)Weight:About 29gQuantity:58pcs/setProduct the gear package contains a variety of different types of gears, all of which can match each other. The modulus is 0.5, and the inner holes are 1.9mm, 2.05 (2.0) mm, 2.4 (2.55) mm, 2.9 (3) mm, etc.Package Include:58pcs Reduction Gear BagNotice:1.Transition: 1cm=10mm=0.39inch.2.Please allow 1-2mm error due to manual measurement and make sure you do not mind before ordering.3.Please understand that colors may exist chromatic aberration as the different placement of pictures.