Reusable k cups to quickly brew coffee with your family and friends. Made of high-quality material, O-ring seal cover to prevent leakage Very easy to pour, brew and clean-Position reminder: Place cup in machine, just turn it gently, there will be small holes matching role of machine, ensuring that cup is completely closed Compared with disposable paper filters or plastic refillable coffee filters, it is more environmentally friendly. Compatible: for K and for K Plus coffee machines Now you can use ground coffee and loose tea, making it very convenient to put coffee in reusable pods. colour:Black Material:Stainless steel + plastic Package Contents: 4 x reusable k cups Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.