The 4K9-Pup comes with a thin .0075 size reed. The open reed design allows you to create a variety of sounds from high-pitched rodent sounds to busy bird distresses. The 4K9-Pup still offers the same raised ridge which helps prevent the reed from freezing to the tone board in cold weather conditions. The 4K9-Pup from FOXPRO has a soft flexible bell for extreme comfort and brings you even more distress capabilities.