will they smudge if used on Architects tracing paper which is very similar to modern day greaseproof paper (not the old tissue style paper)

Just tried it on a piece of grease proof paper and the pen doesn't smudge. I put some lines on the paper and smudged it with my finger and it was alright so should be fine for you.

What size are these? Are these like the mini version or the normal size pen?

These are normal sized pens but with a fine nib, like the mini ones! Hope that makes sense?

Do they come with the box shown

yes but note that the box is not a hard plastic box but cardboard so not sure of its durability. May need to buy a replacement storage case in the long term.

Hi, I have the pack of 42. Does anybody know what the extra 8 colours are in the tin of 50? Thanks :)

Hi :) Here are the numbers of the colours listed on the back of the tin of 50: 10, 1, 110, 43, 2x 430, 4, 24, 2, 48, 29, 222, 20, 23, 61, 21, 62, 6, 260, 69, 36, 63, 30, 37, 3, 34, 54, 550, 53, 5, 52, 51, 38, 55, 57, 16, 7, 73, 76, 77, 82, 8, 2x 9, 101, 401, 201, 221, 501 301. So they give you two of 430 and two of 9, hope this helps!

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STAEDTLER 334 SB20 Triplus Fineliner Superfine Pen, 0.3mm Line Width - Assorted Colours (Desktop Box of 20)

STAEDTLER 334 SB20 Triplus Fineliner Superfine Pen, 0.3mm Line Width - Assorted Colours (Desktop Box of 20)

Product ID: 47995740

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Details

Brand
STAEDTLER
Ink colour
Assorted
Number of items
1
Point type
Fine
Recommended uses for product
Colouring Note

💧dry safe ink technology

✏️0.3mm superfine precision

🖐️ergonomic triangular grip

Description

🖋️ Write sharp, stay vibrant, and never miss a beat!

VIBRANT ASSORTMENT - 20 assorted colors to elevate your notes, sketches, and presentations with flair.
UNCAPPED INNOVATION - Dry safe ink lets you leave pens uncapped for days without drying out—no interruptions.
ECO CONSCIOUS DURABILITY - Made with recycled polypropylene for a sustainable, long-lasting writing companion.
PRECISION IN EVERY STROKE - Ultra-fine 0.3mm metal-clad tip for crisp, detailed writing and drawing.
COMFORT MEETS PRODUCTIVITY - Ergonomic triangular design reduces hand fatigue during long creative sessions.

The STAEDTLER 334 SB20 Triplus Fineliner is a premium set of 20 assorted color pens featuring a superfine 0.3mm metal-clad tip and ergonomic triangular grip. Its innovative dry safe ink technology allows pens to remain uncapped for days without drying out, ensuring consistent performance. Crafted from recycled polypropylene, these water-based ink pens combine precision, comfort, and sustainability for professional and creative use.

Specifications

Manufacturer	Staedtler
Brand	STAEDTLER
Model Number	334 SB20
Product Dimensions	17 x 21.2 x 1.7 cm; 242.2 g
Colour	Assorted Colours
Grip Type	Ergonomic
Material Type	Recycled Polypropylene (rPP)
Number of Items	1
Size	20 count (Pack of 1)
Point Type	Fine
Line Size	0_3mm
Ink Colour	Assorted Colours
Manufacturer Part Number	334 SB20
Item Weight	242 g

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