Design: Compact and lightweight design, easy to carry and keep, recommended for travel and home storage., Internal size:8., 3*4*1., 8 inch, For sale is case only (device and accessories are not included) What is the difference between the TI-Nspire CX CAS Ti Nspire Cx PAIYULE Case For Texas Instruments TI-84 Plus/TI-83 Plus CE/ For TI-Nspire CX II/ / TI-Nspire CX-II T Cas/ HP Prime Color Graphing Calculator (Box Only) Black – GoStore EVA Calculator Case They are very, very different platforms. The 84 is the legacy platform, with an 8-bit CPU and a lineage reaching back to the TI-82 Material: hard EVA material, excellent touch, soft protection of content. WERJIA Hard Carrying Case for Texas Instruments TI-84 Plus CE/TI-84 Plus/TI-Nspire CX II CAS/TI-Nspire CX II/TI-83 Plus/TI-89 Titanium/TI-85 / TI-86 Color Graphing Calculator (black WERJIA Hard Carrying Case for Texas Instruments TI-84 Plus CE/TI-84 Plus/TI-Nspire CX II CAS/TI-Nspire CX II/TI-83 Plus/TI-89 Titanium/TI-85 / TI-86 Color Graphing Calculator