1. A na-eji ntupu naịlọn kpara akpa kpuchie elu ya, nke na-ekechi ahụ waya TPE nke siri ike, nke siri ike ma na-eguzogide ịdọrọ na ịgbagọ.
2. Aluminom shei na shei ọla edo, mgbochi oxidation na corrosion
3. Nkwado nyefe data
4. Ihe karịrị oge 5000 nke nkwụnye na iwepụ, oge 3000 nke ịkụgharị.