Easy to clean. Safe and non-toxic. Designed for use with coffee machines. Condition: Item Type: Blind Filter Weight: Approx. 7g / 0.2oz per piece Package Includes: 4 x Blind Filter Note: Each blind filter is sold separately; coffee machine handle and cleaning powder or tablets are not included. Instructions: Insert the blind filter into the portafilter of the coffee machine. Add 3 to 5g of espresso machine cleaning powder or a cleaning tablet. Activate the brew function for approximately 10 seconds, then turn off. Repeat this process 5 to 6 times with 10-second intervals. After completion, remove the blind filter, rinse the portafilter thoroughly, and reassemble. Color: Black Material: Rubber Size: 5cm x 5cm x 0.2cm Package Contents: 4 x Blind Filter Note: Light and display differences may cause slight color variation between the image and the actual item. Measurement allowance: +/- 1-3cm.