Match the Inner Diameter (ID) of the tube to the outer diameter of the barb fitting or pump outlet it will connect to. For example, a 6mm barb fitting typically requires 6mm ID tubing. The Outer Diameter (OD) tells you how much clearance you need in tight spaces or grommets. If you are unsure, measure your existing fitting with calipers before ordering — a tube that is slightly undersized will grip the barb tightly, while one that is too large will leak.

Quick reference: aquarium air pump outlets are generally 4mm OD → use 4mm ID x 6mm OD tubing. Most small pond pump barbs are 12–16mm OD → use the 12mm ID x 16mm OD or 13mm ID x 18mm OD variants.

Clear PVC tubing of this type is generally considered suitable for food-contact and potable water transfer at ambient temperatures. It is commonly used in home brewing, aquariums, and food processing lines. If your application requires formally certified food-grade compliance (e.g., NSF 51/61 or FDA 21 CFR), please contact us to confirm the specific certification status before ordering.

Clear PVC is generally not rated for prolonged direct UV exposure. Over time, sunlight can cause the material to yellow, stiffen, or become brittle. For outdoor pond or garden irrigation use, routing the tube through a shaded channel, burying it slightly, or wrapping it in UV-protective sleeve will significantly extend its service life. For fully outdoor-exposed runs, a UV-stabilized hose material is typically a better long-term choice.

Standard clear PVC flexible tubing in these sizes typically handles working pressures of 40–60 PSI at room temperature, though the exact rating varies by wall thickness and diameter. Temperature range is generally 32°F–140°F (0°C–60°C). Pressure capacity decreases as temperature rises. For high-pressure or elevated-temperature applications (e.g., hot water lines above 140°F), this tubing is not recommended — contact us to confirm suitability for your specific use case.

Yes. The ID sizes listed are designed to slip-fit over standard metric barb fittings. The tube grips the barb through interference fit — no clamps are required for low-pressure applications, though a hose clamp is recommended for pressurized lines. For aquarium air pumps, the 4mm ID x 6mm OD size is the most common match. Always verify your pump or fitting outlet diameter before selecting a size.

Clear PVC tubing is inherently flexible and resists kinking under normal routing conditions. Smaller diameters (2–5mm ID) are very pliable and can be bent tightly. Larger diameters (10–13mm ID) are stiffer and generally require a minimum bend radius of approximately 3–5× the OD to avoid kinking. If you need to make a sharp bend in a larger size, briefly soaking the tube in warm water (not boiling) will soften it and make bending easier without damaging the material.

You select the length at checkout: 5M (≈16.4 ft) or 10M (≈32.8 ft). Some size variants are available in both lengths; others are offered in one length only based on stock. The quantity option (1 or 2 pieces) refers to the number of rolls of the selected length — for example, selecting "2 pcs / 10M" gives you two 10M rolls (≈65.6 ft total).