Includes: 1 operator, 1 knob, and 1 screw. Works with Ventline Ventadome roof vent models V2092, V2094, V2119, V2128, and V2394. Knob and screw not needed for model V2119 with electric lift. Works with Ventline post-2008 roof vents. Vents made before 2008 require BV0115-04 (KMS #4101151). Specs: arm length 6 1/2". Distance between mounting holes (ctr. to ctr.) 2 3/8".

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov