Keilim 19:6-7

Keilim 19:6

If a band was wrapped around a bed and a corpse touched them, they acquire seven-day impurity; if they are detached, the individual pieces retain that seven-day impurity. If a sheretz (vermin) touched them, they acquire evening impurity; if they are detached, the individual pieces retain that evening impurity. Let’s say that the two longer sides of a bed were removed and replaced with two new ones but the original sockets weren’t changed. If the new sides break, the bed retains its impurity but if the old ones break, it is rendered ritually clean. This is because everything depends on the original parts.

Keilim 19:7

A counter whose opening is on top is susceptible to corpse impurity. If it lost a piece on top, it is still susceptible to corpse uncleanliness but it was damaged on the bottom, it becomes insusceptible. The drawers of the counter remain susceptible and are not considered an attachment to it.