"features:

1. Max. open (approx.): 38mm; Total length: 130mm. Recommend clamp product: 13mm-30mm in diameter.

2. It has a female 1/4""-20 and a 3/8""-16, both the standard fitting sizes in the photo industry for heads and tripods can be used for a variety of attachments.

3. This super clamp is made of solid anti-rust stainless steel metal and black andodized aluminum alloy for high durability. Non-slip rubbers on the inner side provide strength and stability.

4. Small size super clamp, ideal for articulating magic friction arm. Max. load up to 2kg.
If equipped with a magic arm (not included),they will be able to connect to a monitor, a LED video light, flash light and others.

Specification:

Material: Aluminum Alloy
Screw Mount: 1/4"" & 3/8"" screw holes
Clamp Compatible Diameter: 13mm-30mm"