The redesigned Phottix US-A3 is an affordable umbrella swivel for off-camera-flash. Made from tough and durable quality aluminum alloy and fireproof PA66 plastic, the US-A3 is ready for any photographic situation. The ballhead design is easy to adjust for fast on-scene lighting changes. With a 8mm locking umbrella mounting hole the US-A3 will accept most standard sized umbrellas. Included are a locking ring, metal cold shoe for mounting _ashes,. The US-A3 3/8” threaded female lug (with 1/4” threaded insert) mounts to many light stands. A 1/4” to cold shoe adapter is included to mount the US-A3 to a hot or cold shoe accessory. Umbrellas are great lighting modifers. Reflective or Shoot-through, umbrellas help create soft light and other special effects. They are ideal for portrait, interior and product photography. Technical Specs Load: 1500g Weight: 160g Height: 95mm Max. Dia: 33mm