The Birtcher brand, home of the original WEDGE-LOK, also provides rugged printed circuit board card guides, conduction cooled frames for VME, CompactPCI®, PMC applications and extractors for use in non-benign airborne, ship-borne and rugged land transportation environments. In addition to our broad range of standard products, modifications can be made to meet customer-specific requirements. Manufacturer Calmark/Birtcher Series 24 Part Status Active Accessory Type Steel, Chassis Mount, 4.500"