i want to make sure i am reading this correctly, it is 10 pieces, and EACH peice is 48 inches in length, so 480 in total? thanks

10 pieces, 48” each for total length of 480 inches

what is the width of each piece, not the length but the width? Not the package, but the width of each metal piece.

2020 stock is 20mm by 20mm. 2030 would be 20mm by 30mm. and so on. You need to be careful as this only gives you the gross external dimensions. The PROFILE may be different from one supplier to the another AND the purpose may be slightly different. For example, a "V" slot extrusion is specifically for a linear rail system. What you see here is specifically for a T slot hold dawn. In practice I've seen people use the different profiles interchangeably but performance may suffer.

Is it possible to bend these beams on the pipe bender so that the rollers can roll freely on them? A circle with a diameter of half a meter

It is unlikely you could bend it well. This is T5 meaning the hardened level. T6 is typically the maximum. The harness provides strength but makes bending difficult. With all the structure you may not get the channel fit that it has pre bend. If the bend radius is shallow enough you might be able to make it work. As a wild guess I would think it would be well under 10 degree bend. The anodizing also will not like being bent.

The description states european standard extrusion, which is 6mm? but it also states m5 at 5mm? is the slot 5mm or 6mm?

Slot width is 6mm. The M5 is in reference to common hardware that is compatible with this size extrusion but not a reference to the slot width.

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10pcs 48inch T Slot 2020 Aluminum Extrusion European Standard Anodized Linear Rail for 3D Printer Parts and CNC DIY 1220mm Black(48inch)

Product ID: 272090407

Details

Material
aluminum_6063
Brand
IXGNIJ
Item dimensions L x W x H
48.03 x 0.79 x
Color
Black
Shape
Rectangular

📏48-inch (1220mm) precise extrusion length

⚙️6063-T5 high-strength aluminum

🛠️4-groove T-slot for versatile mounting

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Description

⚙️ Elevate your build with precision-engineered linear rails — because your projects deserve the best.

PRECISION 48 INCH LENGTH - Perfectly cut 1220mm rails for seamless integration in your 3D printer or CNC setup.
VERSATILE 4 GROOVE T SLOT DESIGN - Compatible with M3, M4, M5 nuts and pulleys for ultimate customization.
PREMIUM EUROPEAN STANDARD ALUMINUM - Anodized for ultra-smooth, scratch-resistant finish that screams quality.
DURABLE LIGHTWEIGHT 6063 T 5 ALLOY - Engineered for strength without the bulk—ideal for professional-grade DIY projects.
PACK OF 10 WITH PROTECTIVE WRAPPING - Arrives pristine and ready to elevate your automation or maker workspace.

This set of ten 48-inch European standard 2020 T-slot aluminum extrusions features anodized 6063-T5 alloy for high strength and smooth finish. Designed for professional 3D printers, CNC machines, and automation equipment, the rails offer versatile 4-groove mounting compatible with standard T-slot nuts and pulleys. Individually wrapped and precisely cut, these rails ensure durability and flawless integration in demanding DIY and industrial applications.

Specifications

ASIN	B08PQQBHCB
Best Sellers Rank	#3,813 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Linear Motion Guides
Date First Available	December 5, 2020
Item Weight	12.52 pounds
Item model number	2020T
Manufacturer	IXGNIJ
Product Dimensions	48.03 x 0.79 x 0.79 inches

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