Designed to facilitate maximum cleaning performance while ensuring compatibility with the endoscope channelA wide variety of line-up facilitates cleaning of various scopes or different cleaning methodsCompatible CH: 2 to 3.2 mmThe plastic tip at the distal end protects the scope from the wire of the brushThe Olympus cleaning brush has thick, stiff bristles that allow it to make better contact with the inside surface of the scope channel when the scope is wound upAll of the bristles touch and bend equally, allowing the brush to make contact with the entire inside surface of the channel