This is a Photoflex OctoDome nxt Extra Small Kit. It includes an 18 x 18 x 9" (1.5' diameter) OctoDome softbox, metal adapter ring, Adjustable ShoeMount Hardware and HeavyDuty Swivel.
The OctoDome nxt XS softbox is designed for use with strobes or hotlights up to 500W. Its circular design provides a large surface area of diffused light with a unique wrap-around quality. It has removable internal baffle that eliminates hotspots and a removable front face for contrast options. It's ideal for head-and-shoulders portraits or interviews.