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LEGO part 66788: Arm, Long, with Technic Pin

Minifig Upper Body9 colours45 sets

LEGO part LEGO part 66788: Arm, Long, with Technic Pin

Specifications

Reference66788
CategoryMinifig Upper Body
MaterialABS plastic
Colours9
Sets45
Listed pieces110
First appearance2020
Latest appearance2026
Element (Yellow)6315218
Most common colourYellow
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 66788, Arm, Long, with Technic Pin, belongs to the Minifig Upper Body category. It exists in 9 colours and appears in 45 sets of our database, from 2020 to 2026, for a total of 110 listed pieces. Its most common colour is Yellow.

Number 66788 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in yellow, it is 6315218.

Part 66788 through the years

The oldest set in our database that contains part 66788 is 71360 Adventures with Mario Starter Course, released in 2020 in the Super Mario theme. It is still in use: the most recent set featuring it, 42692 Ice Cream & Balloon Stand, dates from 2026.

Its peak year is 2022, with 11 sets containing it. The set with the most copies is 71380 Master Your Adventure Maker Set: 4 copies, against an average of 2.4 per set.

The part is closely tied to the Super Mario theme: 84% of the sets that contain it belong to it. With 45 sets, it ranks no. 1,749 of 2,731 parts in our database and no. 8 of 10 in the Minifig Upper Body category.

Sets containing part 66788, by period

PeriodSets
20205
20215
202211
20236
20249
20258
20261

Colours of part 66788

3 colours appear in only one set: red (71410 Red Yoshi), dark pink (71419 Peach's Garden Balloon Ride Expansion Set) and dark azure (72031 Mario Kart - Yoshi Bike).

Colour (element ID)SetsPiecesExample sets
Yellow63152183166713917138071360
Lime6320142612713677203971490
Bright Pink6359698510713877204271440
Light Aqua6494362 · 629471236713694264371436
White631246236110197139771389
Blue6550195 · 6424442247204271418
Red64020341271410
Dark Pink64283101271419
Dark Azure65233921272031

Where to buy part 66788

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

Search part 66788 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 66788

Sets ranked by popularity that include at least one part 66788, in any colour.

Often found with part 66788

Parts that share the most sets with part 66788, based on set inventories.

Minifigures using part 66788

Part 66788 is used in 2 catalogued minifigure variants. Characters:

More parts in the Minifig Upper Body category

All parts in the Minifig Upper Body category

Frequently asked questions

How many LEGO sets include part 66788?

Part 66788 (Arm, Long, with Technic Pin) appears in 45 sets listed on Setopedia, from 2020 to 2026, in any colour.

Which LEGO set contains the most copies of part 66788?

Set 71380 Master Your Adventure Maker Set, released in 2021, contains 4 copies, the highest count in our database. On average, a set containing part 66788 has 2.4.

Which colours does LEGO part 66788 come in?

9 colours are listed for part 66788. The most common is Yellow, found in 31 sets.

What is the rarest colour of part 66788?

According to our inventories, it is red, found in only 1 set (71410 Red Yoshi).

What is the element ID of part 66788 in yellow?

In yellow, part 66788 has element ID 6315218. Number 66788 is the mould number, the same for every colour.

Is LEGO part 66788 still used in recent sets?

Yes: it appears in sets released in 2026, such as 42692 Ice Cream & Balloon Stand.

Where can I buy LEGO part 66788 individually?

Single parts 66788 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.