The original O-Wacky O-Rings are available in refill packs for the O-Wacky Tool, The Brute, and The Wrangler. They are available in four colors (Black, Clear, Red, Green Pumpkin) and five sizes (9, 10, 11, 14, 16). Sizes 9-11 come 25/pk and sizes 14-16 come 10/pk.