Bottle Cap SRSIL-10 Split Rings 8mm, Silver, 100-Piece Go to amazon.com Related posts Top 10 recommendation bottle cap key 2022 FeatureSilver split rings8-milimeter in diameter100 pieces per pack DescriptionBottle Cap Inc. split rings are 8-Milimeter in diameter. They are made from lead-safe nickel-plated brass. Made specifically for use on Bottle Cap Inc. bottle cap pendants.