The Fasco 30-517 is a Resilient Base. Some of the specifications of the Fasco 30-517 Resilient Base include: Fasco 30-517 5.17" Base B Dimension 3" Shaft Center Height Resilient Base. The warranty information for the Fasco 30-517 is the following: Fasco offers a 1-year manufacturer's warranty on their electric motors and motor accessories.. The Fasco 30-517 Typically Ships Within 1 Business Day. Some additional keywords associated with the Fasco 30-517 include the following: 30-517,FA#30-517. Shaft Center Height 3 Base B Dimension 5.17