Poron case form that has pre-cut lines for you to change the size of. Useful for keyboards that don't come with case foam or if you need more. 

Specs:

• Poron Material
• 2.5mm thick, 12x42cm if uncut. 
• Fits Full Size, TKL, 65% and 60% (Any other size, you need to cut yourself)
• Use to dampen the reverb of the case