Welcome to the Internet's largest offering of high quality tweezers. Most of the tweezers sold by SPI are made in Switzerland, and are the very highest quality tweezers anywhere in the world. At this point in time all gold plating and PTFE® coating of tweezers are also done in Switzerland, and for the same reason - we just have not found anywhere in the world that can match the high Swiss quality. Locate tweezer by Style #
SPI presents a very high quality, state of the art, family of clear fused quartz based products. These products are produced by the leader in the quartz field and uses proprietary processes that give these quartz products an "edge" over all others. We use only the finest GE clear fused quartz for maximum UV transparency!
Nuclepore polycarbonate filters contain uniform, cylindrical pores, preferentially etched into the membrane, allowing for an even distribution of a collected sample in one plane across the entire exposed membrane surface. Contaminant-free, these microporous screens are biologically inert, and offer excellent chemical resistance and thermal stability.
Select the mortar and pestle that has the right characteristics and price for your application. Mortar and pestle sets come in a variety of different materials of construction. Consideration should be given as to whether what is being used currently is indeed the "right" choice given the lower limits of detection possible with modern analytical instrumentation.