The most versatile of the feedblock designs is the patented Variable Geometry(VG™) Feedblock. It features the Cloeren developed Selector Plug™Cartridge, plus our exclusive externally adjustable vane and distribution pin designs. The Cloeren developed Selector Plug™ is an interchangeable cartridge located upstream of the combining section. It enables the operator to quickly change the structure materials without completely disassembling the feedblock. By simply exchanging the Selector Plug™ with one having a different channel routing, you can alter the product layer sequence in less than 30 minutes. Our patented, movable vane design provides for simple, external adjustment of the combining section flow geometry. This feature allows you to compensate for changes in individual layer structure. Our externally adjustable distribution pins, which can be profiled for your particular polymer application, provide compensation at the point of convergence for visco-elastic differences between polymer layers. This feature fine-tunes individual layer uniformity for optimum product quality, and reduces downtime during the structure development process.