• 2" thick with a blue tinted air entering layer 96.4% efficiency 2.31 lb. paint holding capacity 18 gram weight - loose weave and coarse fibers for excellent depth loading Progressive density heavy duty fiberglass The 107X series is the most common arrestor material used today. The 107X features an 18 gram weight with coarse fibers in a loose weave with an exiting scrim for excellent depth loading. The 107X is blue in color and is packaged 1 roll per case. When the customer demands performance at a reasonable price, 107X is the arrestor material for you.