HILTI WATER COLLECTOR SYS DD-WMK-BI, this has been used, still in very good condition. complete as seen in pics.
Features
Enables clean drilling overhead
Collect up to 100% of slurry
Applications
Can be used with the WMS 100 water management system or a vacuum cleaner
Should be used with water collector holders
Should be fixed to a drill stand
TECHNICAL DATA 
Accessory type: Water collector systems 
For use with: DD 120, DD 150-U, DD 160 
Additional accessory information: Set of water collection accessories for use with the DD 120, DD 150-U and DD 160