PEEK tubing is available in OD sizes of 360 micron, 1/32, 1/16, and 1/8 in. with IDs as small as 0.002 in. It comes in variety of natural PEEK, solid color coded, dual-layer color coded, striped, and dash-stripe coded. Pigmented layer of dual-layer color-coded tubing has separate but integrally-bonded inner layer of natural PEEK to eliminate contamination of sample stream by pigments. Tolerance is ±0.0005 in. for IDs up to 0.01 in., and ±0.001 in. for larger IDs.