IVEA Product Part Number 16100 Model 500A
The dowel pins (P/N 16082) that fit in the left and right leg pivot castings (P/Ns 16049/16056) can rotate and gradually maneuver out of the leg casting after several hundred deployment and folding cycles (designed for easy storage) of the IVEA unit.
United States, Australia, Belgium, Canada, China, Germany, Hong Kong, Indonesia, Israel, Netherlands, Singapore, UAE
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-3239-2017