网页2022/03/02 · Acrylic Clear Tubes. Diameter. Choose an option 6mm outer, 4mm inner 10mm outer, 6mm inner 10mm outer, 8mm inner 12mm outer, 8mm inner 15mm outer, 11mm inner 20mm outer, 14mm inner 20mm outer, 16mm inner 25mm outer, 19mm inner 25mm outer, 21mm inner 30mm outer, 26mm inner 35mm outer, 31mm inner 40mm outer,