1. Four thicknesses of CVD graphene: Available in either 1, 2, 3-5 or 6-8 layers 2. TEM Substrate: 200µm thick 3.0mm hexagonal silicon substrate with a 0.5x0.5mm aperture and 200nm thick silicon nitride membrane with approximately 6,400 2µm holes 3. Graphene coverage of the TEM grid is > 75%. (The graphene coverage is typically >75% of the whole 3.05mm diameter silicon TEM grid which encompasses the holey silicon nitride membrane.)