322 Series (.156" (3.96mm) contact spacing) Card Edge Connector with 44 P.C Tail type contacts. The tails are .046" x .013" (1.17mm x 0.33mm) thick and .213" (5.41mm) long in a Dual Row formation, reading both sides of the daughter board. The insulator is Polycarbonate, Grey in color with #4-40 Unified Threaded Inserts.