Kimax® Graduated Cylinders "To Deliver" With Reverse Graduations feature a reverse metric scale. The "TD" (to deliver) appears on each cylinder and indicates the cylinder is calibrated to pour (dispense) and that the cylinder may be used repeatedly without drying. SAFE-GARD bumpers are supplied with sizes 25 through 2000 ml Designed from ASTM Specification E1272, Style 1, Class A requirements.