Axygen® Tip Refill System contains durable refill rack that can be easily refilled by hand and is autoclavable. These translucent Racks include color-coded inserts for tip identification and are RNase-/DNase free. They are available in different colors and are packaged in bulk or racks. Axygen® Tip Refill System contains durable refill rack that can be easily refilled by hand and is autoclavable. These translucent Racks include color-coded inserts for tip identification and are RNase-/DNase free. They are available in different colors and are packaged in bulk or racks.