Replacement Jaw Plate sets are available. LC 27 2.25x3in Laboratory Jaw Crusher reduces 2in (50mm) aggregate, ore, and rock materials to a product with 80 passing a No. 14 (1.4mm) sieve. Jaw opening easily adjusts down to 1mm minimum to closely control output size. The maximum throughput is approximately 50lb (22kg) per hour at 525rpm.