what is the module of these gears?

I don't know. It is not printed on the gears anywhere and I cant honestly see well enough right now to count the teeth. their pretty small. so I don't know.

The promotional codes 5fmsmqp8 and 9l4wnv7 didn't work as i tried them, and none made any differences at all! why? will you fix the issues?

I feel this question is either for Amazon or the supplier, I don’t think I could help.

do you have suggested things you could make w/ these for 7 year old ?

My 7 year old and I made a car using posicle sticks and a glue gun in addition to the kit. Since the gears are so small the tollerance for placing them correctly is pretty tight. My 7 year old wasn't able to line up the axle holes by himself and still have the gears mesh. With adult help and immagination you could make all kinds of contraptions.

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EUDAX 82 pcs Plastic Gear Package Kit - DIY Gear Assortment Accessories Set for Toy Motor Car Robot Various Axle Belt Bushings

EUDAX 82 pcs Plastic Gear Package Kit - DIY Gear Assortment Accessories Set for Toy Motor Car Robot Various Axle Belt Bushings

Product ID: 504208166

📏Axles in 4 lengths (30-100mm)

🔧Multi-functional DIY kit

⚙️82 precision gear pieces

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Description

⚙️ Unlock your inner engineer with the ultimate DIY gear kit!

DIVERSE GEAR TYPES - From crown gears to pulleys and racks, perfect for complex mechanical models.
VERSATILE AXLE SIZES - Includes 30mm, 50mm, 70mm, and 100mm axles for flexible design options.
NO BATTERIES REQUIRED - Pure mechanical fun powered by your creativity, no charging needed.
COMPLETE 82 PIECE GEAR SET - Everything you need to build and customize your own motorized toys and robots.
IDEAL FOR STEM DIY ENTHUSIASTS - Boost spatial awareness and engineering skills with hands-on assembly.

The EUDAX 82 pcs Plastic Gear Package Kit offers a comprehensive assortment of gears, axles, wheels, pulleys, and rubber bands designed for DIY toy cars, robots, and mechanical models. With multiple axle lengths and diverse gear types, this kit supports creative engineering projects and STEM learning for ages 8 and up—no batteries required.

Specifications

ASIN	B0776ZPP7V
Age Range Description	Kid
Best Sellers Rank	935,784 in Toys & Games ( See Top 100 in Toys & Games ) 90 in Toy Interlocking Gear Sets
Brand Name	EUDAX
Colour	Assorted
Customer Reviews	4.2 4.2 out of 5 stars (438)
Educational Objective	Literacy & Spacial Awareness
Indoor Outdoor Usage	Indoor
Is Assembly Required	Yes
Item Dimensions	14.5 x 8.9 x 2.5 centimetres
Item Weight	68 g
Manufacturer	EUDAX
Manufacturer Part Number	EH-GEAR-82KIT
Material Type	Plastic, Rubber
Minimum Age Recommendation	96.00
Number of Players	1
Operation Mode	Manual
Power Source	manual winding
Size	S
Subject Character	Robot
Supported Battery Types	No batteries required
Theme	Car,Robot
UPC	756155716883

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€ 33.05

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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

Secure transaction

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