The diameter of the screw head is 14mm. Material: Acciaio inox AISI 303. We are not responsible for any typo or undeliverable addresses.The item "100x Stainess Steel long 1/4 camera screw for tripod and Quick Release plate" is in sale since Sunday, December 9, 2012. This item is in the category "Cameras & Photo\Tripods & Supports\Other Tripods & Supports". The seller is "well-chosen-2011" and is located in hong kong. This item can be shipped worldwide.