Product description "Triangle Robertson 52.4 mm, mahogany" Robertson triangle (standing triangle) suitable for 52 mm snooker balls. Material and workmanship Robertson triangles are made of high-quality rubber wood (rubberwood). This type of wood with the designation DIN EN 13556 is one of the tropical biological replacement woods. Only after a long drying process is the wood processed. The advantage is the straight fibre gradient which keeps the triangle absolutely distortion-free. It is precisely ground and very robust and is finished with a thin protective coating before production. Tournament suitability Robertson triangles meet billiard standards in terms of size and design and are therefore suitable for tournaments and championships. Design: tournament size 52 mm for snooker balls.