Inquiry (采购产品): plastic filter please let me know if there is a plastic yellow filter that absorb light for the range`wavelengh``less than` <550nm or 500nm.thank you my regards abdelmajd douida **** Hidden Message ***** abdelmajid douida louisville, KY 40217 USA Company: university of louisville Phone: 5022985448 E-mail: douida73@hotmail.com **** Hidden Message ***** douida73@hotmail.com