1. A na-eji akwa acrylic 100% mee okpu ahụ.
2. Okpu nwere oghere atọ, akụkụ ndị ọzọ na-ekpuchi ihu dum, na-ekpo ọkụ ma dị mma.
3. The ákwà bụ na-agbanwe, ya mere echegbula banyere tightness.
4. Okpu nwere agba dị iche iche ịhọrọ, na nha nwere ike ịhazi ya.