NEC 100ns 30 pin memory 4-256kb modules 1mb total 1 meg of 30 pin memory, 100ns. (typically used in xt's,286's,386's.) The second set of memory is a mix NEC Fujitsu 100ns 30 pin simm memory, they have the same model on back 2 modules have Fujitsu chips with motorola parity, the other 2 have NEC chips with motorola parity. made in Japan. If you order 1 set please specify which set you want. Pictures of both sets are shown.#5633, 8603, Terms Conditions: California Residents please add sales tax. Items normally will be shipped usps first class mail. We do ship some items internationally. All sales final with no warranties unless stated otherwise.