Specifications: The lamp holder is made of ABS shatter-resistant material, which has strong bearing capacity and durability. Double knob design, one can control the rotation angle of the lamp holder joint, and the other can clamp and fix the lamp holder. The inner diameter of the umbrella hole is 1cm, which can be inserted into the soft/reflective umbrella of the same specification. It is equipped with a loose screw knob to enhance the stability of the umbrella. The hot shoe holder is tightened with screws to prevent unstable connection between the flash and the lamp holder and increase the safety factor. Item Name: B-type Flash Lamp Holder Material: ABS Bearing Range: 3KG Features: Durable, Stable, Convenient Size: 10.5cm x 5.5cm x 4cm/4.13 and quot; x 2.17 and quot; x 1.57 and quot; (Approx.) Umbrella Hole Size: 1cm/0.39 and quot; (Approx.) Notes: Due to the light and screen setting difference, the item and 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x B-type Flash Lamp Holder Durable, Stable, Convenient ABS B-type Flash Lamp Holder Durable, Stable, Convenient B-type Flash Lamp Holder