White Laboratory Rubber Tubing, 4–20 mm ID, Sold per 1 Metre
White Laboratory Rubber Tubing, Sold per 1 Metre
White flexible rubber tubing with 25 nominal inner-diameter and outer-diameter combinations. Select the ID × OD pair that matches the connection. Each sale unit represents 1 metre (39.370 in / 3.281 ft). The family photographs show several sizes or a coiled sample for illustration, not a multi-size set.
Size Selection
ID is the inner diameter and OD is the outer diameter. Nominal wall thickness is (OD − ID) ÷ 2. Inch equivalents are rounded to three decimal places. The source dimension arrows and product photograph are retained.
| ID × OD (mm) | ID × OD (in) | Wall (mm / in) |
|---|---|---|
| 4 × 6 | 0.157 × 0.236 | 1 / 0.039 |
| 4 × 8 | 0.157 × 0.315 | 2 / 0.079 |
| 5 × 7 | 0.197 × 0.276 | 1 / 0.039 |
| 5 × 10 | 0.197 × 0.394 | 2.5 / 0.098 |
| 5 × 15 | 0.197 × 0.591 | 5 / 0.197 |
| 6 × 9 | 0.236 × 0.354 | 1.5 / 0.059 |
| 6 × 12 | 0.236 × 0.472 | 3 / 0.118 |
| 6 × 18 | 0.236 × 0.709 | 6 / 0.236 |
| 7 × 11 | 0.276 × 0.433 | 2 / 0.079 |
| 7 × 15 | 0.276 × 0.591 | 4 / 0.157 |
| 8 × 12 | 0.315 × 0.472 | 2 / 0.079 |
| 8 × 14 | 0.315 × 0.551 | 3 / 0.118 |
| 8 × 16 | 0.315 × 0.630 | 4 / 0.157 |
| 8 × 24 | 0.315 × 0.945 | 8 / 0.315 |
| 10 × 14 | 0.394 × 0.551 | 2 / 0.079 |
| 10 × 16 | 0.394 × 0.630 | 3 / 0.118 |
| 10 × 20 | 0.394 × 0.787 | 5 / 0.197 |
| 10 × 30 | 0.394 × 1.181 | 10 / 0.394 |
| 12 × 17 | 0.472 × 0.669 | 2.5 / 0.098 |
| 14 × 18 | 0.551 × 0.709 | 2 / 0.079 |
| 15 × 20 | 0.591 × 0.787 | 2.5 / 0.098 |
| 16 × 21 | 0.630 × 0.827 | 2.5 / 0.098 |
| 16 × 24 | 0.630 × 0.945 | 4 / 0.157 |
| 18 × 24 | 0.709 × 0.945 | 3 / 0.118 |
| 20 × 25 | 0.787 × 0.984 | 2.5 / 0.098 |
Material and Construction
The supplied material description is white rubber. The exact rubber formulation, hardness, reinforcement and material grade are not specified. The original photographs show a smooth-bore flexible tube and a range of wall thicknesses. No silicone, EPDM, natural-rubber, food-contact, medical-use, ESD or sterilization certification is inferred.
Choosing and Handling the Tube
Measure the mating connection and check both internal clearance and wall thickness. Avoid forcing the tube onto oversized fittings or using bends that flatten the passage. Cut squarely with a suitable clean tool and inspect the ends for damage. Confirm chemical compatibility and operating temperature for the actual rubber formulation. Pressure, vacuum, tensile, tear and temperature ratings are not supplied, so suitability for vacuum filtration or other laboratory equipment must be checked before service.
Length and Dimensions
Prices are for the selected size per 1-metre order unit. A quantity of two represents two metres in total; a continuous cut or a specific number of pieces is not established by the source and should be confirmed if required. Dimensions are nominal manual measurements, not certified tolerances. The source image clearly labels the 7 × 11 size in millimetres, resolving the workbook's single-letter unit typo.
Original Product Photographs
The following supplied photographs show the range of tube sizes and flexibility. Actual tube geometry and dimension arrows are retained. Chinese captions are translated into English, dimensions include millimetres and inches, and the 1-metre sale unit is stated. Marketplace discounts, shipping or return notices and unsupported performance claims are excluded.
