Reliant 2" Unit Fitting Slip / Union (Black) for C3425/C3525

Part # 91301001B
Sold as each, not as a set of 2

2" Unit Fitting Slip / Union for Reliant Cluster Cartridge Filter Series C3425 / C3525
(AKA Quad-Cartridge Filter)
Item can also be used on all 2" Reliant Pumps

Item # 19 (on diagram)
See pictures for measurements

This is for the BLACK Slip Union, to find the WHITE Slip Union: 
Part # 91301001W