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.
If there is a line of flags, the United States flag should be in the center in front of the line of flags. Crepe streamers may only be affixed to the flag staff by order of the President of the United States. Hang the United States flag with other flags--such as state flags--or pennants.