This is a Pentair C105-137PDBA 1-1/2 HP Full-Rated and 2 HP Up-Rated Impeller Assembly for Sta-Rite Max-E-Glas and Dura-Glas Series Inground Pumps.
This is typically used with Sta-Rite Max-E-Glas Series Pool and Spa Inground Pump Model PE5F-126L; PE6F-183L; PE52F-183L; PEA5G-126L; PEA6G-183L; PEA52G-126; Sta-Rite Dura-Glas Series Pool and Spa Inground Pump Model P2R5F-126L; P2R52F3-183; P2R5F3-183; P2RA5G-126L; P2RA6G-183L; P2RA5YG-183L; P2RA6YG-183L; 1-1/2 HP Full Rated and 2 HP Up-Rated Pumps.
