These .03" thick Chipboard Inserts are multipurpose. You can use them as a strengthener of photographs in cellophane bags as well as a backing for small products like handmade earrings or fishing hooks. They are also useful to provide layers when stacking in boxes.
Sometimes, all white and sometimes natural kraft cardboard on one side and grey on the other. Just depends what we get from our supplier. Both are smooth and look presentable.