In the pictures some show as 18-14G and others as 18-12G, is it an assortment? or all one size?

These are all one size, 18-12AWG, model 221-2401.

can this be used to say splice a break light on a trailer? (outdoor use)

You will have to seal them with a waterproof shrink wrap which I would double up or use a Wago Gelbox. Keep in mind that the Gelbox is only for low voltage applications. So, you can use it for the brake light. You can also use a waterproof heat shrink connector.

will these pass electrical inspection? Will they pass with the NEC and most local inspectors?

Unless they are listed as an approved connection device in the NEC they will not pass inspection in commercial/residential applications for voltage over 48v.

Where can I order the clear splicing 221s? It appears Wago changed the design and applied a opaque white plastic cover. The clear ones were better.

The clear ones are WAGO 221-2411. The clear 221-2411 isn't rated to support 12AWG wire while the opaque 221-2401 does support 12AWG.

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WAGO 221-2401 Lever Nuts Compact Splicing Inline Wire Connectors with Case | 20pc

WAGO 221-2401 Lever Nuts Compact Splicing Inline Wire Connectors with Case | 20pc

Product ID: 515721006

Details

Brand
Peppy Products
Color
Transparent
Connector Type
Clamp
Current Rating
20 Amps
Gauge
12.0
Material
Plastic Copper

⚡20A current rating

🔍Transparent housing for visual inspection

🧰20 connectors in organized case

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€ 29.65

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Details

Brand
Peppy Products
Color
Transparent
Connector Type
Clamp

Description

⚡ Snap. Secure. Simplify your wiring game.

UL LISTED SAFETY ASSURANCE - Certified reliability that meets professional standards for peace of mind.
TIME SAVING LEVER MECHANISM - Snap, secure, and go—no twisting or taping needed for fast, reliable splices.
COMPACT PORTABLE ORGANIZATION - Keep your workspace tidy with a sleek case holding 20 connectors.
VISUAL CONFIRMATION TRANSPARENCY - See your perfect wire insertion at a glance through the clear housing.
EFFORTLESS MULTI WIRE COMPATIBILITY - Seamlessly connect solid, stranded, and flexible copper wires without fuss.

The WAGO 221-2401 Lever Nuts are UL-listed, compact inline wire connectors designed for 20-12 AWG solid and 18-12 AWG stranded copper wires. Featuring a transparent housing for quick visual inspection and a lever mechanism for fast, secure connections, this 20-piece set comes in a handy case, making it an essential tool for professionals and DIYers seeking reliable, time-efficient electrical splicing.

Specifications

ASIN	B0BT8DHLJJ
Best Sellers Rank	#4,686 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #7 in Electrical Connectors
Brand Name	Peppy Products
Color	Transparent
Connector Type	Clamp
Current Rating	20 Amps
Customer Reviews	4.8 out of 5 stars 1,713 Reviews
Gauge	12.0
Included Components	wire connectors
Item Dimensions W x H	3.75"W x 0.9"H
Item Type Name	wire connectors
Manufacturer	Peppy Products
Material	Plastic Copper Polycarbonate (PC)
Material Type	Plastic Copper Polycarbonate (PC)
Model	221-2401
Mounting Type	DIN Rail Mount
Number Of Contacts	40
Number Of Poles	2
Number of Positions	40
Part Number	p221-2401-20
Specification Met	UL
UPC	860006370657

Reviews

T**X

24.10.2025

A**R

18.04.2026

J**M

30.04.2026

V**.

12.02.2026

B**M

22.04.2026

N**D

4.02.2026

D**C

1.04.2026

A**4

30.03.2026

A**R

11.02.2026

M**O

14.03.2026

C**E

27.03.2026

P**O

31.05.2025

L**A

5.12.2024

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