Teledyne Laars Pool Heater Parts Mark V DM 125 DM 175 DM 250 DM 325 DM 400 DR 125 DR 175 T0003400 INSULATION BLOCK, END, 16-1/2 in. X 18-13/16 in.

Teledyne Laars T0003400 INSULATION BLOCK, END, 16-1/2" X 18-13/16"

Used in the following models:
DB175, DB250, DB325, DB400, DC175, DC250, DC325, DC400, DF125, DF175, DF250, DF325, DF400, DH125, DH175, DH250, DH325, DH400, DK125, DK175, DK250, DK325, DK400, DM125, DM175, DM250, DM325, DM400, DR125, DR175, DR250, DR325, DR400