Whether you're optimizing your manufacturing process, rapidly iterating through designs, or assessing form, fit, and function, Formlabs Engineering Resins are formulated to withstand extensive testing and perform under stress. Glass-filled Rigid 4000 Resin prints with a smooth, polished finish and is ideal for stiff and strong parts that can withstand minimal deflection. Consider Rigid 4000 Resin for general load-bearing applications. The “4000” in the name represents the material’s tensile modulus. If you need a stiffer material, try Rigid 10K Resin. Supports print resolutions: 100 and 50 microns.