The CESU2-H140-SS is a Stainless Steel Rectangular Un-Terminated System, 21.02" (533.9 mm) dia., with 16 Openings 0.14" (3.6 mm) to 0.24" (6. mm), 64 Openings 0.18" (4.6 mm) to 0.33 (8.4 mm), 36 Openings 0.24" (6.1 mm) to 0.39" (9.9 mm), 4 Openings 0.31" (7.9 mm) to 0.47" (11.9 mm), 8 Openings 0.35" (8.9 mm) to 0.55" (14.0 mm), 8 Openings 0.55" (14.0 mm) to 0.71" (18.0 mm) & 4 Openings 0.71" (18.0 mm) to 0.98" (24.9 mm). Standard Package Quantity is 1 PC.