Setobrick

LEGO part 99021: Pneumatic Hose Connector with Axle Connector

Pneumatics5 colours261 sets

LEGO part LEGO part 99021: Pneumatic Hose Connector with Axle Connector

Specifications

Reference99021
CategoryPneumatics
MaterialABS plastic
Colours5
Sets261
Listed pieces699
First appearance2011
Latest appearance2026
Element (Dark Bluish Gray)6265669 · 6020189
Most common colourDark Bluish Gray
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 99021, Pneumatic Hose Connector with Axle Connector, belongs to the Pneumatics category. It exists in 5 colours and appears in 261 sets of our database, from 2011 to 2026, for a total of 699 listed pieces. Its most common colour is Dark Bluish Gray.

Number 99021 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in dark bluish gray, it is 6265669.

Part 99021 through the years

The oldest set in our database that contains part 99021 is 8110 Mercedes-Benz Unimog U400, released in 2011 in the Technic theme. It is still in use: the most recent set featuring it, 910059 Privateer Frigate Fortuna, dates from 2026.

Its peak year is 2018, with 30 sets containing it. The set with the most copies is 42100 Liebherr R 9800 Excavator: 42 copies, against an average of 2.7 per set.

It is spread across several themes, led by Ninjago (20%), Star Wars (10%) and Technic (7%). With 261 sets, it ranks no. 602 of 2,731 parts in our database and no. 2 of 3 in the Pneumatics category.

Sets containing part 99021, by period

PeriodSets
2011-2019129
2020-2026132

Colours of part 99021

Its rarest colour, white, appears only in set 77072 Peely Bone.

Colour (element ID)SetsPiecesExample sets
Dark Bluish Gray6265669 · 6020189211512103004212842175
Dark Brown6265670 · 616794243165103167639171753
Bright Green6578887516430174302311501
Blue4648927358110700009448
White65189481177072

Where to buy part 99021

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

Search part 99021 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 99021

Sets ranked by popularity that include at least one part 99021, in any colour.

More parts in the Pneumatics category

All parts in the Pneumatics category

Frequently asked questions

How many LEGO sets include part 99021?

Part 99021 (Pneumatic Hose Connector with Axle Connector) appears in 261 sets listed on Setopedia, from 2011 to 2026, in any colour.

Which LEGO set contains the most copies of part 99021?

Set 42100 Liebherr R 9800 Excavator, released in 2019, contains 42 copies, the highest count in our database. On average, a set containing part 99021 has 2.7.

Which colours does LEGO part 99021 come in?

5 colours are listed for part 99021. The most common is Dark Bluish Gray, found in 211 sets.

What is the rarest colour of part 99021?

According to our inventories, it is white, found in only 1 set (77072 Peely Bone).

What is the element ID of part 99021 in dark bluish gray?

In dark bluish gray, part 99021 has element ID 6265669 or 6020189. Number 99021 is the mould number, the same for every colour.

Is LEGO part 99021 still used in recent sets?

Yes: it appears in sets released in 2026, such as 910059 Privateer Frigate Fortuna.

Where can I buy LEGO part 99021 individually?

Single parts 99021 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.