Guys,thanks for the answers. Cause the rockwool plates are 39,37" (100cm) and 24,2" (62,5 cm) (i`m not an ignorant American


e

e),the easiest way to cut them is to make 4 of 1 and it will be (31,1 " at the base and at the sides 24,6"). I hope that will work! Thanks one more time.