Leviton 13357U - T8 or T12 - Turn-Type Lampholder - Medium Bi-Pin Socket - Non-Shunted - For Programmed Start Ballasts - Standard Profile Medium Base, Bi-Pin, Standard Fluorescent Lampholder, Tall Profile, Slide-On Turn-Type, Captive Nut Screws Packed Bulk, Quick-Connect 18AWG Solid or Str. Tinned Captive Nut Screws Packed Bulk