TUIREL Automotive Cap Plugs Kit for Smoke Leakage Testing and Various Automotive Pipeline Openings, Red 23 Piece Set Automotive Block Cap Plugs Kit for Automotive Smoke Machine Leak Detector

These are simple devices that block/seal/close-off an airway so that you can do smoke testing. I was wanting to test the intercooler/turbo system on my diesel motorhome. The large size made it easy to block the air intake so I could complete the smoke test.The multiple sizes are a plus and allow the user many options. I also like the bright color! Very pleased!MY PERSONAL COMMENTS:I am an approved Amazon Vine Member. We are provided the opportunity to order (free of charge) many items that are new to the market, or where a seller just wants some additional exposure for their product. We are NOT required to review every item in exchange for using it. I personally only order products that are important to me (and/or my wife), items I can use or items that I have the ability to properly test (I have lots of test equipment). So from that use/testing I can provide an honest evaluation & review (and not always a 4 or 5 star) based upon my use and testing of the product. Thanks…and feel comfortable with any information I provide in a review.

It is very nice to have these around the house or garage to plug holes. There are a nice range of sizes and even multiples of the smaller sizes. Nice quality and construction. Good bang for the buck.