Able to break or be broken.
Fragile.
Something that is (easily) breakable.
A set of customized hardware that is part of a drum kit. Breakables typically consist of: the drummer's cymbals including high-hats, the snare drum, the kick pedal and the drummer's stool.
Not impregnable; capable of being pierced or assailed.
Incapable of being impregnated; impermeable or infertile.