Pet Potty Toilet Training Replacement Grass Pad for Pet Zoom Pet Park Large 25" X 20" X 2" 1 REPLACEMENT GRASS FOR THE PET ZOOM PET POTTY TRAINING TOILET SYSTEM THIS GRASS IS COMPITABLE WITH ALL SYSTEMS THE GRASS CAN BE EASILY CUT TO USE FOR SMALLER SYSTEMS made of a synthetic surface that's similar to grass 25" x 20" x 5"