All the parts necessary to build plug/socket combos of up to 8 conductors. The finished components are water-tight. These plug sets have numerous applications for automotive, marine, RV, electronics, etc. As you can see from the photo, it consists of the components necessary to build and install the finished plugs, not finished plugs themselves. This is a great kit but not for the amateur, it is best left to the technicians or the knowledgeable hobbiests to do the assembly.