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

🪱precision worm gears included

⚙️75 versatile gear pieces

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RM98

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Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Unlock your inner engineer with the ultimate gear set!

STEM READY KIT - Perfect for science labs, robotics, and educational projects to boost hands-on learning
DURABLE LIGHTWEIGHT - High-quality plastic ensures long-lasting use without adding bulk
PRECISION ENGINEERING - Includes crown, single, double, and worm gears for smooth, reliable motion
ALL IN ONE GEAR ARSENAL - 75 unique plastic gears and transmission parts for endless DIY creativity
INSTANT PROJECT UPGRADE - Elevate your DIY car or robot builds with professional-grade gear components

The AUKUYEE Plastic Gear Set offers 75 high-quality plastic gears including crown, single, double reduction, and worm gears, designed for DIY car and robot projects. Ideal for STEM education and hobbyists, this versatile kit provides durable, lightweight components to enhance mechanical builds and experiments.

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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