This listing is for a used Taber model 505 dual abrasion testing machine.  This is an older manual machine with rocker switches, knobs and mechanical counters.  The machine was tested and both motors and counters work but the tens digit on the counter sometimes gets stuck on 9 so there are a few rotations that go by without being counted but then it will rollover and stop the unit at the desired knob setting (such as 10, 100 or 1000).  There is the bottom half of a plexiglass sound/dust enclosure that is included, but the top is not included. 

• dual head 
• includes specimen clamp rings and  speciment holders
• set of four 500g weights 
• set of four 1000g weights
• three weight bearings

dims include the plastic  case