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 is also known as the âStars and Stripesâ or the âOld Gloryâ. The present design of the United States flag consists of 13 horizontal stripes of alternating colors of red and white, and a blue rectangle in the upper left corner that contains 50 white stars.