atụmatụ:

1. High ziri ezi vials na atọ e, na-ekwe nkwa site space akara nhazi, ugboro abụọ elu kpomkwem karịa nkịtị otu

2. milled na ma elu na ala n'akụkụ, ihe kpọmkwem na ndị ọzọ ọkachamara

3. Yi ese n'elu na akwa siri na-ọzọ inogide

4. Shockproof na co-akpụzi okpu

5. Co-akpụzi ahụ, na ala adịgide

 6. Na ma ọ bụ na-enweghị magnet bụ ịnara