There are many honeycomb structures in the oak, and the interior of the honeycomb is full of air, so the elasticity of oak is very good. Oak itself is very wear-resistant, and many cylinder pads of engines in various countries use oak as raw materials.

in addition, oak is moisture-proof and moth-proof, which can ensure that wine will not pass away with the years in a dark and humid cellar. This pure natural material has no harm to human body, so it has been widely used in the production of wine and champagne stoppers for more than 111 years.

Extended information:

Morphological characteristics of oak trees

Deciduous or evergreen trees, up to 25 to 31 meters or more. The bark is dark grayish brown and slightly smooth. Branchlets brown and glabrous. Winter buds are ovoid, 3~5 mm long, hairless, with dark brown bud scales, mostly covered with tiles.

The leaves are oval or oval, with a length of 11-21cm and a width of 7-11cm. The top is tapered and the base is wedge-shaped, with 5-7 pinnate lobes on each side, finely toothed lobes, dark green leaves, light green back, hairless or tufted hairs in vein axils. Petiole 2.5~5 cm long, glabrous when old.

the male inflorescence and leaves are open at the same time, and several are clustered; Female flowers are solitary or 2~3 flowers are born on the total stalk about 1 cm long.

Baidu Encyclopedia-Oak