One-tier, 20 module, pull-thru system. 

G20 with the "x-factor." 20 modules + 8 additional. 

Two-tier, 48 module, pull-thru system. 

VPC offers a selection of pull-thru adapters to meet PXI connection needs. Pull-thru adapters consolidate wiring for wired connections and provide a seamless connection to the card for PCB needs.