There are three hairnets. [The hairnet] of a young woman [is susceptible to becoming] tamei with midras tumah. [The hairnet] of an old woman [is susceptible to becoming] tamei with corpse-tumah. And [the hairnet] of one who goes out is tahor from any [form of tumah].

There are three boxes: [Regarding] a worn-out [box] that one patched onto a sound one, we follow [the status of] the sound one. [If one patched] a small [box] onto a large one, we follow [the status of] the large one. [If] they were equal, we follow [the status of] the interior [box]. R’ Shimon says: [Regarding] the pan of a balance scale that one patched onto the bottom of a boiler, [if he patched it] on the inner surface [of the boiler, the boiler is] tamei. [But if he attached it] on the outer surface [of the boiler, the boiler is] tahor. [If] one patched [the pan] onto the side of [the boiler], whether on the inner surface or the outer surface, it is tahor.

All utensils have an exterior and an interior, such as pillows, mattresses, sacks, and martzufin; [these are] the words of R’ Yehudah. R’ Meir says: Any [utensil] that has loops has an exterior and an interior. [But] any [utensil] that does not have loops does not have an exterior and an interior. A table and a delufki have an exterior and an interior; [these are] the words of R’ Yehudah. [But] R’ Meir says: They have no exterior. And so too a tray without a rim.

An ox goad has an exterior and an interior, from seven [handbreadths] for the blade, [and] from four [handbreadths] for the prod; [these are] the words of R’ Yehudah. R’ Meir says: They do not have [an exterior and an interior]; [the measures of] four [handbreadths] and seven [handbreadths] were mentioned only with regard to remnants [of ox goads].