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 American Flag and Its Protocol. The Flag of the United States of America is a symbol of freedom and liberty to which Americans pledge their allegiance by standing at attention, facing the flag with the right hand over the heart, and reciting: