A very small quantity. There are three styles: A, B, and C. A There is a hole. Tighten the screws to the back of the chassis B is equipped with long iron sheets. 12cm C is equipped with short iron plates. 8cm Recommended A for large chassis. Does not occupy PCI space If you can't figure it out. Please make sure to contact the seller. Destination: Us: UK,FR,AU,CA,DE,IT,AT,BE,DK,ES,FI,IE,IN, JP,KR,LU,NL,NO,NZ,PL,PT.SE,SG,and so on... Ship from china.After departure. 5-18 working days.Very fast. If the number of displayed inventory can not satisfy your requirement. Please message to tell me the number you need. I can send you the bill to buy. Extended Serial necessary! Edit photos and description is hard.Do not Copy pictures. Thank you very much Shop goods are real shot,Please rest assured to buy ---------------------------- Some recent tracking number, For your reference. We only send with tracking number of the the parcel Reasonable arrangements the time. Sometimes fast, sometimes slow International transport, take some time, please be patient 9374811015300645714102 9200190341007018722477 9261290336107801040651 9374811015300648564452 9374811015300651196510 9374811015300651187426 9374811015300651173221 9374811015300653580980 9374811015300653554066 9374811015300653559986 9374811015300653595373 9374811015300655999049 9374811015300655923662 9374811015300655925857 9374811015300655923655 search website: DHL Global Mail Americas OR UPS OR FEDEX OR USPS Emergency items Please make sure you choose. The expedited option. thank you. Very fast.2-10 days By FedEx or UPS or DHL --------------------------------------------------------- Attention! About shipping. Small amount. shipping through the post office. Batch (aging quickly). by. International Private Leased Circuit. or. Express transportation business. (UPS FedEx DHL TNT ETC SO FAST ...) International transport takes longer, please be patient. Currently promotional stages, do not charge fees added weight, Do not miss the chance. We only ship according to the paypal address. We only send with tracking number of the the parcel.