Denvilles EZ Rack System is simple to use and guarantees a stable, secure fit into the durable autoclavable racks. Plastic waste is significantly reduced, without any compromise in convenience, quality or rack stability. A unique lock down design eliminates poorly seated refills and accidental flip over. Our proprietary hydrophobic surface technology reduces unwanted sample retention to negligible levels. EZ Racks are also available pre-racked (cat. nos. ending in "-CP and "-CPS) for those who prefer complete rack units or presterilized tips