The A.A.G. Stucchi 3251-H/S-PBT is a shunted, rotary-locking G13 medium bipin lampholder. It is designed for T8/T12 fluorescent or LED tubular lamps. The A.A.G. Stucchi features bottom split pin mounting for quick installation and is constructed from PBT plastic.A rotary lock secures the lamp, ensuring it remains firmly seated in the fixture.