Organic Flared Tunnel Black Areng Wood (OF2) - Available in different types of wood from 6mm up to 18mm diameter. N.B. Organics - reduce odour, are lightweight and warmer in cold weather. Remember to only wash with mild soap and water, and dry afterwards. Remove organic jewellery before swimming or bathing. Keep dry to avoid damage. PLEASE NOTE: As these are natural, hand-made products, sizes may vary by up to 0.5mm (very small).