Dentition ring in untreated birch wood in order to guarantee the quality and sharpness of the product. All wooden rings are polished for a smooth and soft finish. Wooden rings are ideal as a rolling element for mobiles and also as Rings for rattles. Continuous 1 Wood Ring.Matière: Certified birch FSC.Dimer: 70 mm (exterior). Spread: 10 mm. EN71-3 - Tested & approved. The color of the wood can vary depending on the arrivals.