6 PCS Black Walnut Coaster 1. The new woodware is unpainted and environmentally friendly. Please apply a layer of edible oil or olive oil before use, wait for a period of time after absorption and apply it again, maintenance 2-3 times to prevent cracking.2. Do not wash, do not expose to sunlight and high temperature, improper maintenance may cause deformation and cracking.3. After normal use, please dry it with a dry cloth and store it in a cool and ventilated place. In a dry environment, you only need to regularly apply vegetable oil to prevent cracking and deformation.4. The texture and color of each section of wood products are slightly different, because the logs are made from wood. Colors, differences in texture, and wood scars are normal, and are not a product quality problem. Those who pay perfect attention should take caution.Every product we can guarantee is high-quality wood. We insist on rejecting poor and leftover materials. Selected materials are responsible to customers and to themselves.