Product material: polypropylene Product use: connects drip irrigation belt, drip irrigation pipe, water belt, PE pipe, and similar tubing Large quantity: package includes 8 pipe fittings to meet your needs Good quality: made of molded plastic for strength and durability Suitable size: fits pipes with an inner diameter of 13 mm and outer diameter of 16 mm Quick and simple to install: easy to assemble without additional tools; provides efficient, durable, and leak-proof connections for indoor and outdoor applications Wide applications: suitable for use in garden watering, irrigation systems, washing machines, and other water connection needs Scope of delivery: 8 pieces Note: Measurements are manually taken; please allow 17 mm variation. Color may vary slightly due to lighting and screen settings. Actual product may differ slightly from images.