These shields fit snugly onto the shaft of either the Gilson or BioHit pipettes for which they were designed. They protect the user’s hand from radiation during the dispensing sequence and enable safe dispensing into small and narrow neck containers. Beta emissions of ³²P, ³⁵S, ³H and ¹⁴C can be effectively blocked by using 10 mm thick optical acrylic. A new lead containing acrylic co-polymer resin has been incorporated in the manufacture of shields against gamma emissions. The lead content of the resin is 30% wt/wt and is chemically introduced into the acrylic resin as an organolead salt. This material is transparent with a very light brown tint and it exhibits virtually all the normal chemical and physical properties of conventional acrylic resin.