Do they have these same headers but in double row?

Yes, but they are 17mm https://www.amazon.com/dp/B07842GC5F

what is the diameter of the pins?

The pins fit in solderless breadboards so they are 22 AWG for all practical purposes.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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40 Pin Breakaway Headers 0.1" Male Equal Length 2.54mm, Pack of 10

40 Pin Breakaway Headers 0.1" Male Equal Length 2.54mm, Pack of 10

Product ID: 19224547

Details

Centerline Length
15 millimeters
Color
Black
Connector Type
IDC
Item Pitch
2.5
Material
Metal
Mounting Type
PCB Mount

📏0.1" (2.54mm) pitch precision

🔧Breakable into custom lengths

🧩Fits solderless breadboards snugly

B/.24

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡️ Break, Build, and Innovate with Precision Headers!

DUAL SIDED 6 25 MM PIN LENGTH - Long pins on both sides guarantee secure, reliable connections in your circuit builds.
CUSTOMIZABLE LENGTHS ON DEMAND - Easily break or cut headers to fit any project size without compromising connection integrity.
TRUSTED BY MAKERS WITH 4 7 ⭐ RATING - Join hundreds of professionals who rely on these headers for flawless, repeatable results.
BULK PACK OF 10 FOR MAXIMUM FLEXIBILITY - Keep your prototyping workflow uninterrupted with a generous pack designed for multiple projects.
PRECISION PITCH FOR SEAMLESS PROTOTYPING - 0.1" spacing ensures perfect compatibility with standard breadboards and connectors.

These 40-pin breakaway headers feature a precise 0.1" (2.54mm) pitch and equal 6.25mm pin lengths on both sides, making them ideal for solderless breadboards and custom circuit prototyping. Sold in packs of 10, they can be easily snapped or cut to any length, offering versatile and reliable connectivity for professional-grade electronics projects.

Specifications

ASIN	B015KA0RRU
Centerline Length	15 millimeters
Color	Black
Connector Type	IDC
Customer Reviews	4.7 4.7 out of 5 stars (121)
Item Dimensions W x H	0.25"W x 0.25"H
Item Highlight	Long Centered 6.25mm on Both Sides, 15mm in Total
Manufacturer	Generic
Material Type	Metal
Model	706693367467
Mounting Type	PCB Mount
Number Of Contacts	40
Number Of Poles	40
Number of Items	10
Number of Positions	40
Pitch	2.5 millimeters
UPC	706693367467
Unit Count	10 Count

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TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

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