t1 slotYou can insert the T1E1 NIMs into the NIM slot on the supported 4000 Integrated Services Routers (ISRs). In addition to the features listed in Table 1, theseSlot opening width : 4mm Finger width : 6mm; Colour : Grey RAL 7030; T1-E = 40mm and 60mm hehts; T1-EF = 80mm and 100mm hehts; T1-EF have an extra cable retainer moulded into