The “On Guard” line of disposable panel filters offers a variety of sizes in a high-strength pinch-frame construction, says the company. The filters are available in five different styles; 1- and 2-in. thicknesses with fiber glass or synthetic media; and with or without reinforced scrim backing. The pinch-frame construction creates high burst strength, prevents leakage (no bypass), is flexible for hard-to-service installations, and will not come apart under difficult operating conditions, the company says.