The kit contains:

•   Clear silicone rubber sealant to make a water-tight seal around all seams
   
•   Two types of adhesive-backed high-density foam weather strip to fill gaps from irregular surfaces
   
•   A 5/16" drill bit required to drill the 'starter' holes in your door
   
•   Instructions

We think this kit is a useful accessory if you don't have these particular items around the house or if you'd like some ideas for dealing with an irregular surface installation.