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 Eric Ramen

This O-ring set contains a large number and a wide range of sizes. The set comes in a nice split box, much better than the ones I received with removable dividers. If you are a do-it-yourself lover, you can use this set. HNBR, also known as HSN (highly saturated nitrile), is recommended for use in many applications and has better resistance to heat, ozone, chemicals and mechanical stress. Properties than nitrile. Care should be taken when using these o-rings as they stretch easily and will not recover to their original size if stretched too much.