These pans won't rust! The pads are reusable and there is no need to melt sticky wax. The covers close up for the day. The Economy pan is perfect for the beginning dissection project, earthworms, small frogs, clams or grasshoppers - 10 inches x 7 inches. The Standard pan is perfect for general use and medium size specimens such as perch, frogs and crayfish - 11 1/2 inches X 7 1/2 inches The Delux pan is excellent for larger specimens, fetal pigs, bull frogs, and star fish - 12 3/4 inches x 9 inches. Shipped directly from the manufacturer. Not available with rush shipping. Delivery time estimated at 10-14 days or less. Gift wrap not available. Information on how to place your order by fax or by telephone. Product Number: AM9420 (Economy Dissection Pan, Pad and Cover), AM9421 (Standard Dissection Pan, Pad and Cover), AM9422 (Deluxe Dissection Pan, Pad and Cover), AM9423 (Economy Dissection Pan, Pad and Cover, Set of 15, Bulk Packed), AM9424 (Standard Dissection Pan, Pad and Cover, Set of 15, Bulk Packed), AM9425 (Deluxe Dissection Pan, Pad and Cover, Set of 15, Bulk Packed), AM9426 (Economy Dissection Replacement Pad), AM9427 (Standard Dissection Replacement Pad), AM9428 (Deluxe Dissection Replacement Pad), AM9429 (Economy Dissection Replacement Pad, Set of 15)