The Print Holder is made of pinseal ABS and holds a print flat throughtout the developing and wash process.
Print Holders only fit pods of equal size or larger. All print holders are landscape.
It is possible to process prints of a smaller size than indicated on the Print Holder, for example, a 10"x8 print can be processed on a 12"x16" holder but this is not recommended.
The tester can grip any size print but does not hold prints flat so is best used for small trial prints. Due to the tester gripping the paper (as opposed to loosely encapsulating it as the size specific holders do) it may in some circumstances slightly indent the print surface.