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.
1 Wear the American flag pin on the correct area. 2  The pin should be worn on the left side of your body as this is where your heart is located. 3  The pin will protect our heart as a small metal shield, somebody said. 4  Position the U.S. flag pin properly.5  The pin should be worn roughly 1 to 2 inches directly above your heart. The pin should be worn roughly 1 to 2 inches directly above your heart. 2  If you are wearing a suit coat or a jacket with a lapel, the pin should be positioned on the lapel so that it is clearly visible. 3  Turn the American flag pin in the right direction. 4  The pin should be right-side up and straight up and down.