Material: Blue Nylon (Plastic)Standard: GBModulus: 1 ModuleNumber of teeth: 32-50 TeethInner hole: 6mm to 20mmTooth Surface Hardness: Soft enamel surfaceFeatures: Light weight, excessive strength, self-lubrication, good flexibility and coffee noise.Pre-purchase Instructions:1. The general dimensions (likes, step diameter, whole thickness and so on) could be a little different in step with the batch;2. Nylon gear due to materials problem, individual could have burrs, yet won't influence to use. If you mind, please be careful to purchase;3. The module represents the size of the teeth, the larger the module, the larger the tooth, the bigger the corresponding bearing capacity.4. Our shop additionally helps non-standard customization, welcome to inquire!You can discover more products in numerous material, type, coloration , sizes and shapes in our shop! If you've special needs, please touch us, we are able to customise in keeping with your needs!Package includes: 1 piece * According on your choiceNotes:1.The shade of the picture is barely assorted from the genuine object due to camera and light effect, please take the particular object because the standard.2.There is probably 0-0.3mm error for its thickness, 0-3mm error for its diameter / width / length within the guide measurement, please take it into consideration, thank you!