Good balls for Indoor Pitching Machine use?

[Mike66]

I have a question concerning equipment.
We have an indoor facility which does not have any kind of cages or netting. Therefore I am looking for some type of ball which we can use for BP - especially with a pitching machine - which will not damage the interior, walls etc.
Besides wiffle balls and tennis balls.
Does anyone have any experience with using ATEC Tuffy SFT (orange) balls?
Thanks.

 

[Amy in AZ.]

Smush balls www.smushballs.com - The Hottest thing since Whiffle Balls! For more information contact us at baseball@smushballs.com o

Also, Walmart sells a ball that is a toy. It won't go far when hit. It is white and stuffed and about 11 inches. I think they are $1.00.

Toys R Us sells those plastic "pit balls" that are really light plastic and different colors. I think they are 100 for $40.00.