This product is the WIRE ONLY insert for All Things Bunnies Floor Litter Pans. The wire is black vinyl coat 1/2" x 1". Read below for sizing and dimensions! The inserts will fit our Heavy Duty plastic tray sizes (colored trays): 18" x 24", 24" x 24", 24" x 36" Please note that the actual insert dimensions are 3" smaller to fit the pan. Actual size of the 18" x 24" is 17" x 21" Actual size of the 24" x 24" is 21" x 21" Actual size of the 24" x 30" is 21" x 27" Actual size of the 24" x 36" is 21" x 33" The inserts will fit our Dura-Tray plastic tray sizes: 30" x 30" and 30" x 36". Please note that the actual insert dimensions are 2" smaller to fit the pan. Actual size of the 30" x 30" is 28" x 28" Actual size of the 30" x 36" is 28" x 36" The 24" x 36", 30" x 30" and 30" x 36" inserts will be jointed in the middle and have a 2" wire drop in the center to add support.