The LH0752 Leviton 13661-OSL is a G13 medium bipin base, non-shunted* lamp holder with flexible wings for slide on or push fit mounting. It does not have a locator post (post, stop, nib) that positions the socket on the fixture. The LH0752 T8-T12 (G13 base) fluorescent or LED lamp holder has a rotary lock (turn and lock) insertion to keep the LED or fluorescent tubular lamps in a fixed position. It has a 23mm lamp axis (height above fixture pan to center of lamp). The Leviton 13661-OSL is rated up to 660W-600V and is cULus listed. The Leviton 13661-OSL has bottom quick connects that allows for easy installation of wiring. Used with rapid or program start ballasts and LED bulbs that require a non-shunted* lamp holder. It is made of durable polycarbonate. The Leviton 13661-OSL is simialr or equal to the BJB 26.292.1112.50.