Again, bought new, never used, never brought on a trip. $55 plus shipping.

Features

Ceramic/carbon Marathon™ EX element effectively removes bacteria and protozoa including giardia and cryptosporidia
Also removes unpleasant tastes and odors caused by organic compounds, such as iodine, chlorine and pesticides
Filter can be cleaned over and over for maximum field life with no tools required
AirSpring Accumulator™ increases filtration speed up to 1 liter per min.
Bottom screws onto an MSR Dromedary® Bag or Nalgene® water bottle for easy operation (both sold separately)
Easy disassembly lets you troubleshoot and maintain the MSR MiniWorks EX filter in the field
Made in USA.

echnical Specs

Best Use
Backpacking
Filter Type
Pump
Filter Medium
Ceramic with carbon core
Removes/Destroys
Protozoa And Bacteria
Pump Force
10.4 pounds
Pump Strokes Per Liter
85
Output
1 liters per minute
Housing Material
Polyurethane
BPA Free
Yes
Field Cleanable
Yes
Dimensions
7.8 x 3.8 inches
Weight
14.6 ounces