TheAProX XT-HINGEX4 includes Pack of 4AMale-to-Male Tube Hinge can be used for a Ground Support Truss roof system.AThis hingeAfits standardAF31 - F32 - F34AConical 2A Truss.AThe hinge sets, mainly used as hinges in towers, are also used to make various shapes with standard lengths. Mix and combine different pipes and hinges to create unique shapes, angles, and displays. Made from high-grade 6082-T6 aluminum and securely fastened with locking pins and cotter keys, the Single Tube Hinge Block can carry the weight of most stage and lighting while giving you a one of a kind display.ProXAspecializes in high-quality, general-purpose aluminum lighting and stage trussing designed for live stages, theaters, nightclubs, church installations, mobile applications, trade shows, and retail applications. OurAproducts are built using 6082-T6 Aluminum Alloy compositions. This lightweight, corrosion-resistant aluminum has a very high tensile strength, giving you the support and stability you need. The ProX Truss Conical Coupling System allows for genderless trusses, providing a more precise line up of chords and fastening points, while the conical shape of the couplers helps to maintain overall rigidity at the stress points and makes parts harder to damage. This system also makes assembly quick and easy with very few tools needed to complete set up.A