3M is a wide-ranging materials supplier that makes a little bit of most everything. One such offering is their 5558SQ-2(100) water contact indicator patch. We’ve had some questions recently about the quantity this product ships in, what a QTY. 1 order gets you. What’s the unit of sale for this product?
This particular part number is priced and sold as a pack of one hundred indicator patches. This is indicated (though not explained as such) by the “(100)” in its part number.