Their surface exteriors portray individualistic features that define where they have been cut from te bora n on. Their exteriors show porous textures, small furrows and in some examples, the centre ridge of te bora n on. These appear to have been polished and are smooth to handle. They vary in colour from off-white to grey in tone. Te kaburinako is played by two pairs of players. A rolled mat would be folded between them. Each pair playing against each other would throw a disc with the aim of trying to balance it upon the folded mat. Each pair would be allocated the same amount of discs. To finish the game, a player would aim to knock the opposing teams discs off the folded mat.