2pcs 25g Weights For Scotty Cameron Putters and compatible with Newport, Studio series, GoLo, California Series, Button Back, Kombi and My Girl. Weights include protective rubber rings seal (O rings) to avoid moisture from entering your putter weight cavity. Please notice: These are NOT from Scotty Cameron, but 100% fit well. They DO NOT fit Squareback, Fastback, or Detour models.Please confirm this kit can fit your putter before bid. Thanks.