Setobrick

LEGO part 3901: Hair Smooth

Minifig Headwear8 colours29 sets

LEGO part LEGO part 3901: Hair Smooth

Specifications

Reference3901
CategoryMinifig Headwear
MaterialABS plastic
Colours8
Sets29
Listed pieces61
First appearance1995
Latest appearance2025
Element (Black)390176 · 390126
Most common colourBlack
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 3901, Hair Smooth, belongs to the Minifig Headwear category. It exists in 8 colours and appears in 29 sets of our database, from 1995 to 2025, for a total of 61 listed pieces. Its most common colour is Black.

Number 3901 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in black, it is 390176.

Part 3901 through the years

The oldest set in our database that contains part 3901 is 4162 Freestyle Multibox, released in 1995 in the Freestyle theme. It is still in use: the most recent set featuring it, 75419 Death Star, dates from 2025.

Its peak year is 1996, with 5 sets containing it. The set with the most copies is 2000430 Identity and Landscape Kit: 10 copies, against an average of 2.1 per set.

It is spread across several themes, led by Educational and Dacta (48%), Freestyle (17%) and Star Wars (10%). With 29 sets, it ranks no. 2,222 of 2,731 parts in our database and no. 17 of 28 in the Minifig Headwear category.

Sets containing part 3901, by period

PeriodSets
1995-19999
2000-20098
2010-201910
2020-20252

Colours of part 3901

4 colours appear in only one set: tan (10067 Mini-Fig Headgear), light gray (10067 Mini-Fig Headgear), dark tan (9389 Community Starter Set) and medium nougat (10402 Fun Future).

Colour (element ID)SetsPiecesExample sets
Black390176 · 3901261526715394536528713
Brown390175 · 390125910945397869785
Light Bluish Gray421174061875419451032000430
Reddish Brown421115833787996969314
Tan41240691110067
Light Gray4162404 · 41240681110067
Dark Tan4557944119389
Medium Nougat62276181110402

Where to buy part 3901

Setopedia shows no prices: they vary by colour, condition and seller. Amazon links are affiliate links.

Search part 3901 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 3901

Sets ranked by popularity that include at least one part 3901, in any colour.

Often found with part 3901

Parts that share the most sets with part 3901, based on set inventories.

Minifigures using part 3901

Part 3901 is used in 80 catalogued minifigure variants. Characters:

More parts in the Minifig Headwear category

All parts in the Minifig Headwear category

Frequently asked questions

How many LEGO sets include part 3901?

Part 3901 (Hair Smooth) appears in 29 sets listed on Setopedia, from 1995 to 2025, in any colour.

Which LEGO set contains the most copies of part 3901?

Set 2000430 Identity and Landscape Kit, released in 2013, contains 10 copies, the highest count in our database. On average, a set containing part 3901 has 2.1.

Which colours does LEGO part 3901 come in?

8 colours are listed for part 3901. The most common is Black, found in 15 sets.

What is the rarest colour of part 3901?

According to our inventories, it is tan, found in only 1 set (10067 Mini-Fig Headgear).

What is the element ID of part 3901 in black?

In black, part 3901 has element ID 390176 or 390126. Number 3901 is the mould number, the same for every colour.

Is LEGO part 3901 still used in recent sets?

Yes: it appears in sets released in 2025, such as 75419 Death Star.

Where can I buy LEGO part 3901 individually?

Single parts 3901 can be ordered on Pick a Brick (lego.com) in colours currently produced, or on BrickLink for older colours. The part is also included in the sets listed on this page.