Frequency is determined by the length, width, thickness, and material. Sheet resistance is a special case of resistivity for a uniform sheet thickness. Some folios are thicker than the usual parchment thickness, such as folios 42 and 47. This allows measurement of the leaflet thickness and their displacement relative to the annulus. This air space provides an insulating thickness of . These may include conductivity, solderability, permeability, thickness, and weight. He plays using a nylon flatpick of 0.75 mm thickness. It comprised large cast irregular shape structures of variable thickness and slope. It is used to curl a material of specific thickness. Steelpans are built using sheet metal with a thickness between . An energy range of corresponds to shell of thickness in -space. This method allows great precision in determining the thickness of circuitry. There are wide variations in both thickness and shape for udon noodles. The strakes were enclosed by transverse bulkheads of the same thickness. The fan is about long, wide with a maximum thickness of .