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 the U.S. flag is displayed other tha. from a staff, it should be displayed flat, o. suspended so that its folds fall free. Whe. displayed over a street, place the union s. faces north or east, depending upon the. direction of the street.