Description 4mm-8mm Polymer Reducer & Joiner All fittings in this range have been manufactured from a high-grade polymer that ensures longevity. All fittings in this range have been manufactured with a large internal diameter, ensure for a free flow of air/water This Fitting has been designed to be used in conjunction with flexible hosing such as PVC airline. The fitting simply pushes tightly into the corresponding size of flexible hose/tubing. For a water/airtight seal ensure the fitting is the correct size for the flexible hose/tubing for example a flexible hose/tubing with an INTERNAL DIAMETER will require a fitting with a 10mm OUTSIDE DIAMETER. ensure you have double-checked the size before purchase.
