Check the listing for details. Reusable Single K-Cups Compatible with Keurig 1.0 Coffee Pod System,6 Pack. Color: Black, Condition: New. Listed at 10.95 USD. 6x Solo Reusable Refillable Single K-Cup Compatible with Keurig 1.0 Coffee Filter Pod System,6 Pack Use your own gourmet ground coffee in a Keurig brewer--Just fill the Reusable filter with your favorite coffee and pop it into your brewer.....Just like a regular K cup 100% BPA free No need to remove or swap out the filter holder; Built-in permanent stainless steel micro mesh filter Works in Keurig B31, B40, B44, B60, B50, B66, B70, B77, B200, B140, B145, Breville Kcup, Mr. Coffee Kcup , Cuisinart Kcup They are NOT compatible with KEURIG B30 - B130 - B150 - B 155 or 2.0 SystemThey work only for 1.0 System only. This is an aftermarket item made to fit Keurig Coffee Makers FEEDBACK:We will leave feedback after receiving a feedback. If for any reason you are dissatisfied with your purchase, please contact us immediately before leaving any NEGATIVE FEEDBACK so we resolve whatever issue you may have. 100% Customer satisfaction! Sales Tax: CA residents will be charged sales Tax SHIPPING: Orders are usually processed within 24-48hrs. All weekend purchases are shipped Monday. RETURNS: Returns are accepted but must be authorized in advance.