Wellbore system, a member and method of making same

A method of making a valve arrangement for an inflow control device,

• the valve arrangement having a member in operable communication with a flow passageway, the member being movable between at least a first position and a second position, the member allowing flow through the flow passageway when in the first position, blocking flow through the flow passageway when in the second position, and allowing partial flow through the flow passageway when in any position between the first position and the second position, the method comprising:
• depositing material layer-by-layer;
• and
• adhering each new layer to a previously deposited layer, thereby building via additively manufacturing, the member such that the member is a single element having anisotropic density such that a first end density of a first end of the member is greater than a second end density of a second end of the member, the first end density and the second end density both being either greater than or both being less than a target fluid density of a target production fluid and both being either greater than or both being less than a first fluid density of an unwanted production fluid, the first end density being greater than a second fluid density, the second end density being less than the second fluid density, the second fluid density being between the target fluid density and the first fluid density.