The PYROGENT Plus Gel Clot LAL Assay combines PYROGENT LAL with a matched control standard endotoxin together in one box kit. Standard kit sizes include 4,000 tests, 250 tests, or 200 tests. The 4,000-, 250, and 200-test kits require depyrogentated 10 x 75 mm glass reaction tubes to run the assay.