From what I understand, the durability between the two is quite different. The PTFE membranes are used for the filtration of organic solvents where as the PVDF membranes are generally for low protein binding. Furthermore the PTFE membranes typically require a polyethylene support.
When the U.S. and Washington State flags are flown from a cross staff, the U.S. flag flies from the peak and the Washington State flag occupies the position on the right end of the cross staff (the observer's left). Additional Information on Display US Flags.
The U.S. flag always goes on the left side when you are looking at the display. That does not matter when you go behind it or infront its the left/right side. However difrent country flags should be on seperate equal height poles. They should go from left to right or right to left alphabetically based on the language of the country they are in. Since we are in an english speaking country though the flags go from left to right.