W8N8-150 8 Inch Full Range Prousound Speaker Features: Nominal Diameter 200 mm (8 in) Overall Diameter 223.8/207.9 mm (8.81/8.18 in) Bolt Circle Diameter 210 mm (8.27 in) Baffle Cutout Diameter 184 mm (7.24 in) Depth 116.7 mm (4.59 in) Flange and Gasket Thickness 10.7 mm (0.42 in) Net Weight 1.7 Kg (3.74 lb)