Product review (5 stars): Product photo shows two units.  There is one per package. Order two!
Super easy to install. Really, no instructions are needed. There is a small hole in the gray tubing. It faces the bottom of the fridge.  The old ones that I removed were fused and brittle from the heat of the condenser.  You will save yourself at least $200 doing this yourself.  I am a homeowner, not a technician.
THERE ARE TWO DIFFERENT STYLES OF THESE DRAINS. THEY FIT THE SAME.