Our Stainless Steel Roller Ball Inserts fit our 5ml, 15ml, 30ml and 60ml euro-dropper bottles. They are made of out of a combination of PP and PE plastic with the stainless steel ball. These do not fit our 10ml roll-on bottles.
Removing: Some folks use a teri washcloth to remove the roller top from the bottle, but I have a difficult time gripping it. Instead, I use a small, flat-head screwdriver to pry it out.
Cleaning: The roller top is actually 3 pieces, making it easy to clean between uses. I use warm, sudsy water, rinse well, and then alcohol with a Q-tip if needed.
