Ibhodi le-osb lingahlukaniswa ngamamaki amane: i-osb1, i-osb2, i-osb3, ne-osb4.
I-osb1 ibhodi lenjongo evamile nezinto zokuhlobisa (kuhlanganise nefenisha), ezifanele izimo ezomile zasendlini. Ingashintsha ngokuphelele i-MDF ne-PB ukwenza ifenisha yasendlini ephezulu, elungele yonke imboni yekhabhinethi nekhabethe.