This is a combo 16bit 42pin and 40pin KEE Willem EPROM adapter, good for these EPROM chips: 27C400, 27C800, 27C160, 27C322, 27C4096, 27C1024, 27C2048, 27C202, 27C201, 27C220, 27C210, 27C240 This combo 16bit adapter package includes the following items: 1. Combo 16bit 42pin and 40pin KEE Willem EPROM adapter, fully assembled; 2. 3 jumper wires;