These are truly flexible inserts made out of reef safe TPU for the Anemone EZRemove boxes. The boxes now come with them. This listing is only for people that have ordered the boxes with the old style inserts. You will only receive the inserts made out of TPU in the amount you order. Check this blog post for more information. They are only available in black at the moment. Please allow a few days for manufacturing, especially if you order a large quantity.