Thanks so much guys ,yes its a gum rubber i purchased from a supplier ,wanted to cut 1/4 in squares for catty's thinkin it should have some longetivity and the stuff is very streatchy ,actually tried to cut some bands but they were not real straight bit jagged gonna use em any way ,but now with your input i'm gonna try cutting them your way's ,an if i can get nice straight cuts well i'l provably stay with the squares for a bit as i bought a 1 foot square of it ,,oh an at this time i have some .440and .445 lead balls from muzzle loading that i'l use for game ,till i can get a good mold ,can you