APPLETON ELECTRIC. Range 0.67 in to 1.04 in, Box Connection 1 1/4 in MNPT, Material – Cord Connector Copper Free Aluminum, External Strain Relief Material No External Strain Relief, Gland Color Code No Code, Body Color – Cord Connector Silver, Number of Cords 1, Style – Connector Straight, Strain Relief Type No External Strain Relief, External Strain Relief Length 1 21/32 in, Length – Box to End of Connector 1 in, Insulated No, Standards C22.2 No. 30, UL 2225, UL 514B.