Sta-Rite 27001-0009S Lower Half Tank Shell Replacement for Pool And Spa Filters Genuine Pentair Replacement Parts Includes 24900-0510 adapter fitting, 27001-0051 safety latch, & 27001-0054 PosiLok ring Fits Sta-Rite System:2 PLM Series modular media cartridge filters Fits Sta-Rite System:2 PLD Series Modular D.E. Filters Product measure 16.5 inch length, 16.5 inch width, 16 inch height