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.
When displaying the flagâ¦. 1  From your porch, place the union (blue section) at the peak of the staff. 2  Against a wall or on a window, place the union (blue section) at the top left corner. 3  On your vehicle, clamp the staff to the right front fender. 4  With another flag, place the U.S. flag to your left when crossed.