E entsoe ka khalase ea boleng bo holimo ea borosilicate mme e fumaneha ka boholo ba 6 ho sebetsa ka liphaephe tse fapaneng tsa metsi.
Boholo: 2.5 ″, 3 ″, 3.5 ″, 4 ″, 4.5 ″, 5 ″
Phoso ea tekanyo e ke ke ea qojoa kaha lihlahisoa tsa rona li entsoe ka letsoho,
Haeba o hloka sehlahisoa ka litekanyo tse nepahetseng, ka kopo ikopanye le rona pele.