Grindenstein Knock BoxAn essential for any espresso machine starter kit, the Grindenstein knock box solves the messy problem of disposing of used grinds from your group handle. Available in Charcoal, Red or Silver, this dump box is super strong and compact enough to slot away on the tray of your machine when it's not in use. Plus coffee grind waste makes great compost, so you can empty its contents into your garden! Length: 10. 2cm Width: 11cm Weight: 0. 24kg