Na afọ nke ahụmịhe na mmepụta plasting mpempe akwụkwọ (petg) 0.520 , anya doro ' . ) ... (Petg) 0.5mm (0.020 ') .... Na mgbakwunye na ndepụta ngwaahịa dị n'okpuru, ị nwekwara ike hazie mpempe akwụkwọ pụrụ iche nke plastik (petg) nke 0.5mm (0.020 ') dị ka mkpa gị ka mkpa.