D = opening at the narrowest point. Other size and goods are available in our shop. All our items will be sent to you in a bubble wrap envelope to ensure that they reach you in a perfect condition. We only sell what we have in stock so as a result ALL our items are sent straight away. This item is in the category "Business & Industrial\Fasteners & Hardware\Other Fasteners & Hardware".The seller is "xpas5644" and is located in this country: CN. This item can be shipped worldwide.