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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プラスチックギアセット、75個シングルダブルリダクションギアウォームギア DIY 車ロボット QY12用

プラスチックギアセット、75個シングルダブルリダクションギアウォームギア DIY 車ロボット QY12用

Product ID: 764920613

🔧10+ gear types included

⚙️75 versatile gear pieces

🛠️100% high-quality plastic

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Description

⚙️ Unlock your inner engineer with the ultimate gear set!

READY TO ASSEMBLE - Comprehensive kit with spindles, belts, pulleys, and more—everything you need in one box.
DIVERSE GEAR TYPES - From single to double, crown to worm gears—over 10 varieties to master any mechanical challenge.
PREMIUM BUILD QUALITY - Durable, high-quality plastic ensures smooth operation and long-lasting performance.
PERFECT FOR STEM DIY - Ideal for robotics, model cars, and educational experiments—engineer your future today.
ALL IN ONE GEAR ARSENAL - 75 precision-crafted plastic gears and accessories to fuel your DIY innovation.

This AUKUYEE plastic gear set includes 75 high-quality pieces spanning over 10 gear types such as single, double, crown, and worm gears. Designed for DIY enthusiasts, robotics, and educational projects, it offers durable plastic components that ensure reliable performance and versatility for complex mechanical builds.

Specifications

ASIN	B06XCG24HZ
おすすめ度	4.1 5つ星のうち4.1 (326) var
ブランド名	AUKUYEE
メーカー名	AUKUYEE
メーカー型番	QY12
モデル番号	QY12
同梱商品	ギア
素材	プラスチック

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

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プラスチックギアセット、75個 シングル ダブル リダクション ギア ウォームギア DIY 車 ロボット QY12用

Description

Specifications

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プラスチックギアセット、75個シングルダブルリダクションギアウォームギア DIY 車ロボット QY12用