The 3D basket filters extend either inside or outside an enclosure, doubling surface area. Housed in a one-piece fabricated frame, the filters come in hexagon, square, rectangular, and diamond-grid patterns for 85% openness. A variety of foam media options provide high dust arrestance and lower resistance where permanent, cleanable filters are needed.

Universal Air Filter Co., 1624 Sauget Industrial Pkwy., Sauget, IL 62206, (800) 541-3478,