Https://www.lybrary.com/the-enchanted-wa......139.html now available after decades kept secret.this is great AUTHENTIC chinese magic brought back from Mark Wilson's groundbreaking tour in 1980.never seen in the west.self working.can be made from an industrial thread spindle(fiber or plastic) with epoxy and sealed inside with liquid plastic or fabricated using copper or tin sheet metal if you have that skill.different from the foo or any other can effect.am using it as my finish.very pleased...great DIY project...