PrimoChilll 1/2in. Rigid PETG Tube 36in. - 4 Pack - Black Superior Strength to Acrylic Tubing Trusted/Experienced Brand, Proudly MADE IN THE USA Glass-like transparency, Virgin PETG Material Thicker Wall for safer operation, 8 Vivid Colors to choose from Compatible with PrimoChill Rigid Ghost/Revolver Compression Fittings.