8 Delrin ball bearings Assortment for Folding coins to make Coin Rings. Assortment of 1 each Delrin ball 3/8" 7/16" 1/2" 9/16" 5/8" 3/4" 7/8" 1" These 8 pcs assorted set of high quality Plastic Delrin balls are made in the US and is a must have in order to maintain the inner detail of a coin ring. Delrin balls are soft enough to not damage the inside of the coin ring. Delrin acetal balls maintain a natural lubricity, giving them a low coefficient of friction against metals. Free Shipping ! ! ! |