The Guerrilla calculator zipper case is the perfect carry case for any graphing calculator. It's strong, durable, anti-shock, weatherproof EVA material will protect your calculator along with its accessories. The removable wrist strap allows for more convenient carrying. Some of the calculators that the case will fit are: TI-83, TI-84,TI-84 color, ti-89, ti-nspire, HP, casio etc. This case will also fit the Guerrilla protective silicone case or the Guerrilla hard slide case. The case comes along with 2 Guerrilla mechanical pencils, Guerrilla eraser, lead refill, and Guerrilla graphing ruler. The dimensions of the case are: outer- 8.3" L x 4.3" W x 2.2" H. Inner bottom- 8" L x 4" W x 1" H. Inner lid- 8" L x 4" W x 0.7" H.