GrasHeading Since G.R.A.S. Sound & Vibration was established in 1994, we have been 100% dedicated to developing and manufacturing high-quality measurement microphones and related acoustic equipment.   All microphones provided by G.R.A.S. are constructed with a stainless steel protection grid and housing as well as a special stainless alloy diaphragm for unmatched durability and longevity. All our high precision measurement microphones are delivered with a 5-year warranty against defective materials and workmanship.   Should you, for whatever reason, damage a G.R.A.S. product, our unique design and unparalleled techniques allow for repairs at very reasonable prices - including the replacement of damaged microphone diaphragms.   This service applies to standard, special and customized microphones. It provides you with confidence in the long term use and stability of the equipment, and your purchasing department with...