
Usoro nke UC na-ezo aka na ahaziri ahazi, ejiri ọtụtụ ebe Ohiri isi ngọngọ nkeji bọọlụ nwere aka nkwụnye aka. N'ime isi ha bụ bọọlụ nwere oghere dị omimi nke nwere a dayameta mpụta okirikiri (SPB) emebere ka ọ dabara n'ime oghere okirikiri dabara adaba nke ụlọ nkedo. Na-akwado metric akụkụ, A na-ahazi usoro isiokwu a maka ngwa mmepụta ihe na-achọ ikike ibu dị elu, nrụnye kwụ ọtọ, na arụmọrụ a pụrụ ịdabere na ya.
| ISO | UCPA 213-41 | |
| Nrụpụta Mba. | UC 213-41 | |
| Ebe obibi | PA213 | |
| Obere dayameta | d | 2-9/16 nke |
| Ebe mgbago anya gaa na okirikiri etiti. oche diam | h | 3 in |
| Ogologo ụlọ | a | 6-19/64 nke |
| Ebe dị anya n'ịtinye oghere | e | 4-7/8 n'arọ |
| Obosara ụlọ | b | 2-3/4 nke anụ ọhịa |
| Nha Bolt | S | M16 |
| Omimi eri ngwunye oghere | I | 63/64 nke |
| Ogo ụkwụ ụlọ | g | 19/32 nke |
| Ogologo ụlọ | w | 5-29/32 n'arọ |
| Obosara mgbanaka dị n'ime | B | 2.563 n'arọ |
| Anya ihu akụkụ/ebe etiti | n | 1 in |
| Ibu ibu | 4,915 n'arọ | |