Marson Klik Poly-Nut Inserts. Marson KlikÂ® Poly-Nuts. Aluminum & Plated Steel. KlikÂ® Poly-Nuts can be used in a wide range of applications and are designed to provide a very efficient and cost-effective method of placing permanent threads in thin materials. Installed from one side, KlikÂ® Poly-Nuts are perfect for use in metal, fiberglass and rigid plastic previously too thin for tapped threads.
Cerebrospinal fluid (CSF), a clear, colorless fluid produced in the brain, contains glucose, proteins, and other substances also found in the blood. CSF surrounds the brain and spinal cord, serving as a cushion for the brain in the skull.
1 The flow of cerebral spinal fluid is blocked. 2  Abnormal circulation of cerebral spinal fluid causes inadequate absorption by the membranes covering the brain. 3  The brain size is small (cerebral atrophy or there is a localized injury), and the fluid volume appears large as it fills in space.