Siemens 6ES7953-8LG31-0AA0 S7 Nflash Micro-Memory Card, For Use With SIMATIC S7-300/C7/ET 200 Series CPU, 32 mm H x 24 mm W x 1.4 mm D | State Electric
Siemens - 6ES79538LM310AA0 - Micro Memory Card, Simatic For S7-300/C7/ET 200, 3.3 V NFlash, 4MB S7-300 Series - Allied Electronics & Automation, part of RS Group