Check your model back ipad

The model number on the back cover

 

IPAD 2 3 4 (old)

 

IPAD MINI 1-2

 

IPAD MINI 3

 

IPAD MINI 4

 

IPAD 9.7 2018

 

IPAD PRO 10.5

 

IPAD PRO 12.9

 

IPAD PRO 12.9 2ST GEN