Greiner Bio-One 169501 Test Tube, 16 mm Diameter, 152 mm Height, 20 mL Nominal Volume, Polycarbonate (Pack of 1500): Amazon.com: Industrial & Scientific
Amazon.com: 16mm OD x 2m Seamless 316 Stainless Steel Tubing : Industrial & Scientific
Amazon.com: FULAIERGD 1/2 inch Tubing (1/2" ID x0.6-0.63" OD) 16mm to 1/4 inch Irrigation Tube Anti-Drop Barbed Hose Fittings (Fits 13mm ID / 4mm ID) (1/2 to 1/4 inch Four-way) : Industrial
uxcell PVC Clear Vinyl Tubing, 16mm(5/8") x 20mm Plastic Tube Flexible Water Pipe 3.3ft - Amazon.com
Amazon.com: 3/16" ID (5 mm) 7/16" OD (11 mm) Food Safe Certified (NSF 51) Vinyl PVC tubing Multipurpose Tube for Beer Line, Kegerator, Wine Making, Aquaponics, Air Hose, Clear (10 Feet) : Home & Kitchen
Amazon.com: Joywayus 16mm x 12mm Pneumatic Tubing Air Compressor Tubing PU Pipe Polyurethane Hose Tube Fluid Gas Transfer 16.4ft 5 Meter Black : Industrial & Scientific
Amazon.com: uxcell PETG Tubing Hard Tube 12mm ID, 16mm OD, 0.5m/20inch Length, Clear for PC Water-cooling System 2pcs : Electronics
Amazon.com: uxcell 8 M 12 x 16 mm Plastic Flexible Corrugated Conduit Tube for Garden,Office Gray : Electronics
Corning Pyrex Borosilicate Glass Heavy Wall Rimless Ignition Tube, 16mm Outer Diameter x 125mm Length (Case of 288): Science Lab Culture Tubes: Amazon.com: Industrial & Scientific
Amazon.com: PrimoChill 12mm ID x 16mm OD Rigid PETG Tubing - 750mm Length (RTP16M-630), Made with Premium Materials, Excellent Beginner Hardline for PC Watercooling, Made in the USA - 6 Pack - Clear : Electronics
Amazon.com: ARRIS 330mm 16mm x 18mm x 330mm Glossy Surface 3K Roll Wrapped 100% Pure Carbon Fiber Tube for Quadcopter Multicopter (2PCS) : Industrial & Scientific
16x150mm Glass Test Tube, With 16mm Rubber Stopper, Black (Pack 10) Karter Scientific 402A2: Amazon.com: Industrial & Scientific
Amazon.com: Melodica Tube, 53cm Length 16mm Dia Plastic Flexible Melodica Pianica Tube Mouthpiece with a Mouthpiece for Musical Instrument Organ Harmonica : Musical Instruments