OnSite has the ability to integrate with Vendor API's. This feature allows users to get accurate pricing and availability of items Vendor sells. In addition, you can create and send POs directly from OnSite eliminating the need to call Vendor or use their website to order product.
Below is a link to the Vendor Size Translation Table and Vendor Shipping Methods
Below is the link to the Vendor Integrated Price Lists
Vendor Integration - Setup
Using the Vendor Integration