每块 is a quantifier phrase meaning 'each piece' or 'per piece'. It is formed by the determiner 每 (every/each) plus the measure word 块 (piece, chunk, or unit). You'll often see it in pricing contexts (每块五元 '5 yuan per piece') or when referring to individual items in a set. In Chinese, the pattern 每 + measure word is a common way to express 'per' or 'each' in terms of units.