What type of plastic are these made out of?

Typical plastic gears. Not a hard rubber. Good to have if you ever need a backup.

What size hole is in the gears? Are they all the same?

they vary from.0625 or 1/16 to .115 or 2.875mm that not any standard everything is +or- .003 there is no standard that they match,the plus or minus .003 is the test on my parts that i have

i need a double gear with 22 teeth at 14mm diameter and 12teeth at 10mm do you have please?

Hi thanks for your question. This is link of the size and specification of each gear → https://mega.nz/#F!BdpFVaZA!QzSstICCpv1_ZAt5UIaAPQ Any other question please feel free to contact us through email kuyiuss@outlook.com. We will always happy to help you out. Thank you!

ddoes this work for a goovi d380 ?

Hi, thanks for your question. This is the the size and specifications of each gear. Please have a look. https://mega.nz/#F!BdpFVaZA!QzSstICCpv1_ZAt5UIaAPQ

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Plastic Gear Set, 75Pcs Single Double Reduction Gear Worm Gear for DIY Car Robot QY12

Product ID: 41378433

🔄single & double reduction gears

🪱versatile worm gear included

⚙️75 precision plastic gears

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£13.77

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Description

⚙️ Gear up your genius — build smarter, faster, better!

STEM READY KIT - Perfect for labs, science education & robotics enthusiasts
ALL IN ONE GEAR ARSENAL - 75 diverse parts for endless DIY innovation
PRECISION PLASTIC BUILD - Durable, lightweight gears engineered for smooth operation
INSTANT CREATIVITY BOOST - Unlock next-level DIY car & robot builds with one set
VERSATILE TRANSMISSION OPTIONS - Includes crown, single, double, worm gears & belts for complex projects

The AUKUYEE Plastic Gear Set offers 75 high-quality plastic gears including crown, single, double reduction, worm gears, and belts, designed for DIY car and robot projects. Ideal for STEM education and hobbyists, this comprehensive kit enables complex mechanical builds with durable, lightweight components.

Specifications

ASIN	B06XCG24HZ
Best Sellers Rank	#166,385 in Toys & Games ( See Top 100 in Toys & Games ) #39 in Toy Interlocking Gear Sets
Brand Name	AUKUYEE
Customer Reviews	4.1 4.1 out of 5 stars (342)
Included Components	GEARS
Manufacturer	AUKUYEE
Material Type	Plastic
Model	QY12
Part Number	QY12

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