This listing is for a pair of 4' Carpeted 2x4 Bunk Boards.  
Color:  Black 
Wood:  Pressure Treated Pine Pine
Size:  2"x4"
Quantity:  (2) Boards 
Carpet 
The carpet is a non-woven carpet manufactured from 100%  high UV BCF olefin fibers.  
All the fibers are anchored into an acrylic backing, giving excellent stability and long-lasting durability.  
It will not rot, fuzz, zipper or unravel. 
It will not absorb moisture and is extremely hard-wearing, stain resistant, mold and mildew resistant. 
Great for PWC or Boat trailers
Wood
Pressure Treated Pine for outdoor use
Staples
The carpet is installed with galvanized 1/2" staples.