Bakuma Industrial BD-150MVS Round Hooded Vent Vent with Rattle (Round / Opening: Small) Fire Protection Damper Included 72 Degree 5.9 Inch (150 mm) Material: Main Body/SUS304 (Stainless Steel) Finish: Hair Line (Hood) Acrylic Electroplated Finish Fuse: Standard Operating Temperature / 148°F (72°C) (120°C). At ℃, when you place an order. Please specify. Dimensions: A:214 B :145 C :106 D :78 E :54 F :9 G :23 (mm) Fit pipe:146 mm? 6.1 inches (154 mm) (inner diameter); Manufacturer: Bakuma Industry; Note: No wall mounting holes.