Cescolite Heavy-Weight Plastic Developing Tray (White) - 14x17"

It is a plastic material. We cannot certify it suitable for use with food preparation.

My trays have rounded bottom cornersThe flat bottom size (before the radius begins) is 15 x 18 Halfway up into the radius, the size is 15.5 x 18.5 At the top of the radius (1/2 off of the bottom) the size is 16x19 The sides taper out to 16.5 x 19.5 at the rim. Found on Internet