The studioking cbt-4m is a telescopic cross beam with a maximum width of 4 meters. both ends can be connected to almost any lamp stand with spigot connector. the cbt-4m consists of two telescopic tubes. you can easily connect them and then fix the whole system with the included allen key. when the set is disassembled, it has a length of 118 centimeters. you can take it everywhere with you, because it fits without any problems into your car. Usage cbt-4m You use the cbt-4m with your background cloth or paper roll, for example during a photo shoot. because the width is adjustable between 2.25 meters and 4 meters, the cbt-4m is suitable for many backgrounds. for example, the falcon eyes or linkstar background paper of 2.75m and 3.56m. you can fix the background on the cbt-4m with a spring clamp, please see the optional accessories.