Made to fit Kalita's 1-2 cup server (base diameter 9.5cm). Made to fit Kalita's 1-2 cup server (base diameter 9.5cm). It has some elasticity, so it should fit other manufacturers' 1-2 cup servers as well. Slits are intentionally placed on the sides so that you can always check the extraction volume markings. You can also take out the handle attached to the server body from here (in that case, the extraction markings will be hidden, so please measure while extracting on a kitchen scale). ◈ Bottom diameter: Approximately 10cm ◈ Height: Approximately 7cm ◈ Body: 100% acrylic, Button: Wooden ◈ Machine washable in a laundry net. You can always check the extraction volume markings. You can also take out the handle attached to the server body from here (in that case, the extraction markings will be hidden, so please measure while extracting on a kitchen scale). ◈ Bottom diameter: Approximately 10cm ◈ Height: Approximately 7cm ◈ Body: 100% acrylic, Button: Wooden ◈ Machine washable in a laundry net.