Refillable Filter Cup For Keurig Brewers Decaflo-plus Spray Head With 10 Vertical Inlets. Plus 1 Botton Inlet For Even Distribution Of Hot Water Throughout The Solofill Cup Grinds Coffee Completely Built-in Self Tamper On The Lid Automatically Packs Coffee To A Preset Consistency Built To Last Extra-wide Heavy-duty Hing Ultra-fine Micro-mesh Stainless Steel Filter Smooth Internal Surgace For Easy Cleanign Easy 2 Steo Filter Compatible With Keurig B30 & B31 Brewers