Link Gulf P4420-04 Fisherbrand Lab-Jack Size 4″X 4″ Fisher 14-673-50
Nonsparking anodized aluminum plates for maximum safety in the lab
Models 14-673-51, 14-673-52, and 14-673-53 have threaded holes to accommodate an 18 7/8 inch long (48cm) aluminum rod for mounting ring stands and other lab apparatus.