Profile: Astec Mobile Screens, Inc. supplies screening solutions. Our product includes mobile screening plants, portable & stationary screen structures and the PEP line of high frequency screens for the quarry, recycle, sand & gravel, mining and other material processing industries. Our PEP high frequency series includes the PEP Vari-Vibe® & PEP Duo-Vibe® high frequency screens. Our PEP high frequency screens provide an aggressive screen vibration directly applied to the screen media that allow for the highest screen capacity in the market for fines removal, chip sizing and dry manufactured sand.