https://www.platt.com/p/0502510/greenlee/gre-138308-piston-flow-contro/783310015949/gre138308
Greenlee 138308 :: GRE 138308 PISTON FLOW CONTRO :: PLATT ELECTRIC SUPPLY
GRE 138308 PISTON FLOW CONTRO, Cat #: 138308, Mfr: Greenlee
greenleepistonflowcontroplatt