View Full Version : request for help

Irene Mcclay
05-03-1993, 01:36 AM
Dear Colleagues,
I have been searching for hollow spheres (ie. polypropylene) to be used as
markers with a video-based motion analysis system. We need markers that are
approx 15 mm or 0.5 in. diameter. I have contacted numerous plastics companies
across the US and the closest standard sizes are 10 and 20 mm. Custom
orders require huge quantities. We have tried toy stores, science stores
and crafts stores without success. Does anyone know of any sources for this
Thanks in advance,
Irene McClay, PhD
University of Delaware
Motion Analysis Laboratory