The menorah of the temple, as described in Biblical scriptures, has seven branches. The menorah contained the lamps that were filled with a one-day supply of consecrated oil and continued burning for eight days. (See article Celebration of Light.)
The hanukkiyah celebrates that miracle. The hanukkiyah is a nine-branch candlestick. Of these branches, eight represent a day each of the eight-day miracle when the Maccabees clensed the temple and lit the menorah lights. The ninth branch holds the shamash, or servant candle, which is used to light the other candles.
At the Kehilat Rosh Pinah bookstore, we have some regular hanukkiyahs and some electric ones, as well as candles and Hanukkah greeting cards. The Kehilat Rosh Pinah bookstore is open after shabbat services.