Size Guide: Corner Joints for Aluminium Profiles, Plastic, and Metal Tubes

Find the Perfect Fit for Your Frame Building Project

Whether you're building a lightweight photography blind, a heavy-duty storage rack, or setting up a custom extraction system, getting the
right fit is the difference between a project that holds strong and one that falls apart.  We supply corner joints for aluminium profiles, plastic tube, or metal tube we have the connector to fit your needs - no matter the size required.

Our versatile 2-way, 3-way, and 4-way corner joints are engineered for a seamless, push-fit connection. No welding, no hassle. This dedicated guide outlines the compatible sizes for our corner connectors, focusing on both round tube and square tube profiles.  Buy your tube connector size you need directly from our website or contact us for any other custom geometry you may require.

Tube Profile Connector Style Material Compatibility Compatible Sizes (Outer Diameter / Side Length)
Square Tube 2-Way, 3-Way & 4-Way Corner Joint Aluminium profiles, Steel, Plastic Metric (mm): 10, 11, 12, 12.7 (1/2"), 13, 14, 15, 16, 17, 18, 19 (3/4"), 20, 21, 22, 23, 24, 25, 25.4 (1"), 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 1 1/2", 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76
Round Tube 2-Way, 3-Way & 4-Way Corner Joint Aluminium profiles, Steel, Plastic Metric (mm): 9.5 (3/8"), 10, 11, 12, 12.7 (1/2"), 13, 14, 15, 16, 17, 18, 19 (3/4"), 20, 21, 22, 23, 24, 25, 25.4 (1"), 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 1 1/2", 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76

Why Choose Our Corner Joints?

Our round tube and square tube corner connectors offer unmatched benefits for your projects, ensuring quality and ease of use:

  • Massive Versatility: We stock the sizes the big box stores don't. From a tiny 9.5mm up to a heavy-duty 76mm (or larger if you contact us to discuss), our joints fit steel, aluminium, and plastic profiles seamlessly.
  • Industrial-Grade Strength: Don't let the word "plastic" fool you. Our plastic joints are engineered to hold firm for light to medium-duty applications, ensuring your frame won't wobble or bow.
  • Fast, No-Weld Assembly: Build your project in minutes, not days. Our push-fit design means anyone can assemble (and disassemble) complex frames with zero welding experience.

Visit our corner joints page here to find the perfect connectors for your current project.

Ducting Connectors & Reducers

Expanding your setup? We now carry a full range of ducting connectors and reducers to ensure perfect airflow and extraction management. Just like our frame joints, these are designed for precision and durability.

  • Ducting Reducers & Splitters: Perfect for stepping down pipe sizes or splitting airflow into multiple directions.
  • Inline Connectors: Join two identical ducting pipes securely.

Dont find the right size? we can help - contact us today