The HH Fluorescent 1-1703 is a Non-shunted, G13 medium bipin tombstone, lampholder, socket. It is T8 or T12 LED or Fluorescent tubular lamps. It is rotary locking to fix the lamp in place. The HH fluorescent 1-1703 has a 30mm lamp axis and does not have a locator pin/ post/ stop.
Link to T8,T10,T12,lamps that fit this socket