SAMT's looms weave wire fabrics for filters. During weaving, the wires are crimped to secure the intersection between the warp and weft to prevent slippage. The looms weave fabrics with square, rectangular, or zero mush. Applications include screening, separating, grading, sifting, filtering, and screen printing. Classification of woven wire fabrics is by the inside mesh width and wire gage. The open mesh area is another important unit of measurement expressed as the percentage of all mesh openings in relation to the total fabric area. G. Bopp of Zurich, which is one of the leading manufacturers of these fabrics, produces them in rolls and sheets, die cut, cut to length, or as ready to use filter elements.