Heavy pellet trap is made of 3 mm steelplate with 4 mm steelplate at the back, making it resistant to high power PCP air rifles. We have tested this pellet trap ourselves with the Gunpower Texan (677 Joules) at a distance of 10 meters with not even a dent as result!
This pellet trap has a dimension of 14 x 14 cm and has 2 openings at the back.