The Rhino Thumpa Bag Insert liners are made using recyclable and biodegradable materials and are thick and strong. Bags fit the Thumpa860 and CKTL, and make removing used coffee grinds as easy as emptying a rubbish bin. Heavy duty bags lift straight out of the tube and are easily disposed of without mess. Roll of 100. The weight of bag liners and knock tubes together is 7.5kg / 16.53lbs.