1. Nchekwa nkwa
2. igwe anaghị agba nchara shei anticorrosive na uzuzu uzuzu
3. Jiri ihe na-egbochi ire ọkụ
4. Nwere PC bọtịnụ, silicone waterproof mgbanaka
5. Ọrụ dị elu, siri ike na ntụkwasị obi.
Enwere ike iji ngwaahịa a na:
Ụgbọ njem, mmalite, ụlọ ịsa ahụ, ngwa ụlọ, ngwa ahụike, njikwa ohere, wdg.