Outer Diameter 351.6 mm (13.84 inch) Inner Diameter 241 mm (9.49 inch) Length 458.7 mm (18.06 inch) Overall Length 471.4 mm (18.56 inch) Efficiency 99.9 Efficiency Test Std ISO 5011 Family EBB Type Primary Style Round Media Type Cellulose Outer Diameter 351.6 mm (13.84 inch) Inner Diameter 241 mm (9.49 inch) Length 458.7 mm (18.06 inch) Overall Length 471.4 mm (18.56 inch) Efficiency 99.9 Efficiency Test Std ISO 5011 Family EBB Type Primary Style Round Media Type Cellulose Outer Diameter 351.6 mm (13.84 inch) Inner Diameter 241 mm (9.49 inch) Length 458.7 mm (18.06 inch) Overall Length 471.4 mm (18.56 inch) Efficiency 99.9 Efficiency Test Std ISO 5011 Family EBB Type Primary Style Round Media Type Cellulose Outer Diameter 351.6 mm (13.84 inch) Inner Diameter 241 mm (9.49 inch) Length 458.7 mm (18.06 inch) Overall Length 471.4 mm (18.56 inch) Efficiency 99.9 Efficiency Test Std ISO 5011 Family EBB Type Primary Style Round Media Type Cellulose