The purpose of this paper is to investigate the properties and distribution of the classifier -ah in Arabic. The investigation will turn out to shed light on the count-mass distinction in general, and in Arabic in particular, and will result in identifying two distinct types of plural markers, differing in their semantics, in their morphology, and in their syntax, one corresponding roughly to the type of plural marker found in English, at times referred to as inclusive, and the other returning solely exclusive plural reading. It will also result in motivating a structural distinction between quantifiers and cardinals, with the latter merging below the former.