Ray Foster Model Trimmers are constructed from heavy gauge cast aluminum with stainless steel and solid brass fittings. The machines are finished, inside and out, with a high gloss white epoxy coating that offers durability, corrosion resistance, and a very attractive finish. Resiliently mounted and precision balanced for smooth, quiet operation, they are designed to assure years of service free performance under the most demanding laboratory use. The Ray Foster Model Trimmers are the original "swinging door" trimmer and is the benchmark by which other model trimmers are measured.