Used on mrap - m-atv with cs13 pop and sne. 0.180" hole diameter washer consist ofa type 300 stainless steel washer bonded to a neoprene washer. temperature range is -45 degrees to 125 degrees fahrenheit.
0.275" hole diameter washer consist of a type 300 stainless steel washer bonded to a neoprene washer. temperature range is -45 degrees to 250 degrees fahrenheit.