Leviton Medium Bi-Pin Snap-In or Slide on T8 fluorescent lampholder with Lamp Lock. four position lamp-lock socket with 90 degree rotation for quick re-lamping, anti-vibration design, slim profile, front pushing wiring and chemical resistant white thermoplastic. Push in Wiring terminals accept number 18 AWG solid or twisted and over tinned leads, stripped 3/8 in.