Ok I went to Lowe’s, and I picked up some stainless steel rings from the hardware department. THey were 96 cents a piece, and they came in 1, 1.5, and 2 inch diameter sizes. I picked up ‘5’ 1.5” rings to make my own PE weights. Each ring weighs .44 lbs (200g). I picked up one 2” ring to test for my ball size. It seems for me that the 2” ring will work for my ball ringer kit. Tommorow, I am going to Lowe’s, and I will pick up four more rings to build my collection. Five rings will weigh 2.2 lbs (1 KG), and it provides approx. a 1” stretch. I hope this will help.