Mykinâs RN00170, Nitrile (BUNA-N) 70 durometer, is a general purpose copolymer of butadiene and acrylonitrile. This compound has a relatively high acrylo content, making it exceptionally resistant to petroleum base oils and hydrocarbon fuels over a temperature range of -40Â°F to +250Â°F.
Wichita Falls is a city in and the county seat of Wichita County, Texas, United States. Wichita Falls is the principal city of the Wichita Falls Metropolitan Statistical Area, which encompasses all of Archer, Clay and Wichita counties. According to the 2010 census, the city had a population of 104,553 making it the twenty-ninth most populous city in the state of Texas. In addition to Sheppard Air Force Base, Wichita Falls is also home to the Newby-McMahon Building, constructed downtown in 1919 and since known as the  world's littlest skyscraper .
DALLAS COUNTY. Dallas County, in north central Texas, is bordered by Kaufman and Rockwall counties to the east, Tarrant County to the west, Denton and Collin counties to the north, and Ellis County to the south. Dallas is the county seat and largest city. The county's center point is at 32Â°46' north latitude and 96Â°48' west longitude. Dallas County comprises 902 square miles of the primarily flat, heavy Blackland Prairie. Elevations in the county range from 382 to 850 feet above sea level. The Elm Fork and West Fork of the Trinity River meet near downtown Dallas. The county is drained by the Trinity River and its tributaries, including White Rock, Mountain, Fivemile, Tenmile, Muddy, Duck, Turtle, and Mesquite creeks.