KWON Tai-Chi and Kung-Fu practice swords are made of red oak wood. Weights: 400 g, 450 g Lengths: approx. 80 cm & 85 cm Point! Instructions for weapons made of red/white oak wood: When you have removed the possible cover, polish the possible protective lacquer with a 0 or 1 rough sandpaper. After that, oil the wooden weapon with a vegetable oil (for example a sunflower oil). The oil prevents cracking and drying of the wood.