Review on 🔧 High-performance PANGOLIN 270 Piece O-Ring Assortment Kit for A/C Automotive, Mechanic, and Home Repairs - Professional Grade Rubber O-Rings - Grommets included - Heavy Duty Tools - 18 Sizes/Case by Adam Cornelison

I always seem to run to my local hardware store to buy o-rings in small packs. Hopefully this o-ring kit will make those rides unnecessary in the future. There are 18 standard sizes in this set which is more than enough for my needs. Everything is organized in a practical drawer with dividers. These green o-rings are much more versatile than the more common black o-rings found in home center plumbing departments. They work in almost every application. I converted the air conditioning from R12 to R134 in an older car. From studying the conversion process, I learned that black o-rings wear out when in contact with refrigerants, while green ones do not. This kit should come in handy for any DIY enthusiast.