Bamboo arrived, but was a bit on the narrow side from the advertised 4-5 cm diameter. One of three canes was about 4 cm. The others barely reached 3 cm. So I made a tiny one of 10 x 4 cm. Awwwww Also seeing the need now, for the smaller 11 mm heater cover . But still have to wait for the cork. This was the only piece left and its hole is now too big, for the 11 mm glass cover.