Waterway Booster Pump Volute 3158300 this is the front half of the pump wet end with 3/4" suction fitting

Mfg #: 315-8300, Item #: SPG-101-8300, UPC Code: 806105493750

Seal Plate 311-8300 (is obsolete) back half of pump wet end. 

Part of Booster pump kit, Mfg #: SG3810430-1PDA , Item #: SPG-10-3048, UPC Code: 806105514950

 California Residents WARNING: Cancer and Reproductive Harm

 www.P65Warnings.ca.gov