The TOWERPACK™ refill system allows you to refill tips quickly and easily. The tip racks are color-coded for easy identification and compliance with Good Laboratory Practice (GLP). The TOWERPACK™ refill system uses 60 percent less space on your bench and 70 percent less plastic than a regular rack box. Racks can be refilled using only one hand without touching the tips. TOWERPACK™ is used with the Universal Refill Box (F167100).