Profile: Gem-Trim provides CNC machining services. Our product line includes fisher valve trim, masoneilan valve trim and power plant valve trim. We produce replacement plug and stem assemblies & seats, as well as guide bushings, gaskets, diaphragms and soft goods. Our Fisher® EB Body Valves are used in general controlling applications. We offer complete overhaul and calibration of valves, positioners & associated equipment as well as reconditioning valve bodies.