This chelating agent for the Roland DWX-4W Wet Mills works to prevent material waste from bonding to the mill and coolant tank. This chelating agent (ZCH-250D) must be used in combination with coolant additive (ZAW-1000D) and distilled water. ZCH-250D comes in a 250ml bottle. * NOTE: This product replaces ZCH-100D, which came in a 100ml bottle.
