The lightweight construction and compact-size of these stands make them a practical tool for your lighting support needs. With a patented Quick Stack System (QSS) you can easily stack the stands together with their built in connectors for portable transport and storage. The adapto collars and spider casting Material is crucial to provide high performance and light weight. Adapto is the new material specifically developed by Manfrotto for both collars and spider castings is comparable to aluminum in strength, but is 50% lighter and has a superb resistance to extreme temperatures and will not corrode or oxidize. Additionally, Adapto is an excellent vibration absorption material. the new Adapto collars are made from a single locking component, ensuring better performance and easier maintenance. A stronger and more ergonomic handle makes it easier to secure stands into the operating position. A 3/8’’ screw top female to 1/4” adapter male (015), allows you to connect additional accessories. A new bi-injection casting provides the photographer with a better ergonomic grip. TECHNICAL SPECIFICATIONS: arm tube diameters: 25.22.19.16mm.; closed length: 33.86 in.; footprint - maximum diameter: 42.91 in.; material: aluminum; max load: 5 kg.; maximum height: 93.31 in.; minimum height: 39.76 in.; 4 sections. 3 risers; weight: 2.65 lb.