Amazon.com: 1 Length 1/2" OD x 3/8" ID x 24" INCH LONG THIN WALL CLEAR ACRYLIC PLEXIGLASS TUBE - .50" Diameter - 12.7mm - 1/16" WALL : Industrial & Scientific
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3M(TM) Single (Thin) Wall Flexible Polyolefin Heat Shrink Tubing FP-301, 1/2 in x 100 ft, Clear: Electronic Components: Amazon.com: Industrial & Scientific