, Rough Opening Shape Round, Overall Diameter 6 in, Includes 110 V Spring Return Actuators, Switch Action Normally Open. dia.Damper,Rnd,Sprg Ret,110V,Nrm Cls,5 In.
, Rough Opening Shape Round, Overall Diameter 8 in, Includes 110 V Spring Return Actuators, Switch Action Normally Closed.Damper,Rnd,Sprg Ret,110V,Nrm Opn,8 In. dia.