A co-extrusion head for forming high-aspect ratio gridline structures in a micro extrusion apparatus includes multiple sheets that are machined and assembled to define three-part fluidic channels having associated outlet orifice disposed along an edge surface of the head. Thus, a brightness distribution is optimally improved according to image quality of a digital image to be processed. Upon engaging in an interconnect call over the first modem with the first communication system, the multi-camp mobile communication device receives a dispatch call at the second modem from the second communication system. The outer sphere containing the liquid is clear and may include a loop to provide a means of attachment to outerwear used by the end user. Thereby a specific one of the reservoir tubes can be selected by the operating portions for use. The inner tire member is made of a resilient material that is essentially incompressible but rather easily deformable, and has protuberances and recesses formed in its circumferential surface to allow for both radial compression and lateral expansion of its material, thereby ensuring resilient support of the outer tire member.