Organic Tunnel Rengas and Ebony Wood (OT2) - In addition to the single wood organic plugs and tunnels, the mixed wood plugs and tunnels offer further choice. 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).