Surpluscomputers.com generally uses specific shipping carriers for their orders, which are typically determined by their shipping policies and procedures. While customers may prefer certain shipping carriers, it is not always possible to choose a specific one during the checkout process. It is advisable to review the available shipping options presented during checkout, as this will generally reflect the carriers that Surpluscomputers.com has partnered with. If a customer has a significant preference or requirement for a particular shipping service, it may be beneficial to check the current web page for any available contact information. This can provide the opportunity to inquire directly about the possibility of using a specific shipping carrier for their order.