Home / Access Control / G.R.I. Telemark VSB-08-W G.R.I. Telemark VSB-08-W Request a Quote This product is already on your Quote Request Browse your Quote Request Brand: G.R.I. Telemark FireAlarm.com Part #: 27686 Category: Access Control Manufacturer Part #: VSB-08-W Specifications Features Resources Information Weight 1.00 lbs Brand G.R.I. Telemark Features This unique invention has been designed in response to requests from installers for a switch that would allow window venting of four to six inches before breaking contact and creating an alarm condition. The VSB-08 will allow the homeowner to arm his system and at the same time permit venting of any window on which the Vent Switch has been installed. A window so equipped, either slider or double hung, can be opened or closed while the VSB-08 maintains an extended influence of approximately eight inches at 1/2″ air gap.