Product Description1) Material: Zinc Die Cast2) Size: From 1/2" to 4",set-screw & compression type3) Manufactured to UL 514B specifications4) Concrete-tight when taped.5) Male hub threads NPS.6) For use in dry locations to economically bond EMT conduit to a box or enclosure8) Aluminum Die Cast,Zinc Die Cast and Steel EMT ConnectorSet-Screw Type are also available.Interested buyers pls feel free to contact me asapWe are looking forward to your kind enquiries.Contact Person: Bruce RedCompany: EVT Electrical Co., Ltd. Mobile:86-13958127096T#:86-571-82450872F#:86-571-82230156E-mail:bruceling88(at)gma1l. c0mMSN: Bruce_ling88(at)h0tma1l. c0mYahootalk:bruceling88@yah00.c0mSkype:evt_electrical