Amazon.com: Interlocking Rubber Mat Flooring 4' x 6' x 3/4" for Gym or Equine Stall, Heaviest Duty, Indestructible, Non-Slip, Smooth or Diamond Surface - The Standard (3/4" Thick, Interlocking Diamond Plate) :
The Rubberman Stall Mat - DRV4-10L Standard Interlocking Component - 4'X6' | The Cheshire Horse