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 wire check

🧰20-piece compact kit with case

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Description

🔌 Connect Like a Pro, Stay Powered with WAGO!

COMPACT ORGANIZED - Includes 20 connectors neatly packed in a durable plastic case—perfect for on-the-go pros and tight spaces.
TRUSTED INDUSTRY STANDARD - UL certified and top-ranked in electrical connectors, backed by thousands of 5-star reviews.
RELIABLE 20 AMP PERFORMANCE - Engineered with stainless steel clamps to deliver a secure, worry-free connection every time.
EFFORTLESS MULTI WIRE COMPATIBILITY - Seamlessly connect solid, stranded, and flexible copper wires from 20-12 AWG for ultimate versatility.
VISUAL ASSURANCE WITH TRANSPARENT HOUSING - Instantly verify proper strip length and wire insertion—no guesswork, just confidence.

The WAGO 221-2401 Lever Nuts are premium inline wire connectors designed for quick, reliable splicing of 20-12 AWG copper wires. Featuring a transparent housing for easy inspection and a compact 20-piece kit with case, these UL-certified connectors deliver 20 amps of secure current flow, making them a top choice for professionals and DIYers alike.

Specifications

ASIN	B0BT8DHLJJ
Best Sellers Rank	#4,586 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #5 in Electrical Connectors
Brand Name	Peppy Products
Color	Transparent
Connector Type	Clamp
Current Rating	20 A
Customer Reviews	4.8 out of 5 stars 1,906 Reviews
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 Items	20
Number of Positions	40
Part Number	p221-2401-20
Specification Met	UL
UPC	860006370657

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€ 35.91

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In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

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