This document discusses a study on the flexural strength of hybrid polymer composite materials made of E-glass fibers, carbon fibers, and graphite particles in an epoxy resin matrix. The study varies the thickness of the laminates from 2mm to 4mm and uses two different grades of epoxy resin, 5052 and 556, as the matrix material. Flexural tests were conducted to evaluate how the flexural strength is affected by varying the laminate thickness and using different matrix materials. The goal of the study was to generate material property data for these hybrid composite laminates fabricated using the hand layup and room temperature vacuum bag molding process.