Foam Block

Comes in the following sizes:

8" x 2" x 4" 

Premier 75, RedFlex 4in1 100

10" x 2" x 4"

Premier 125, RedFlex Reef 100, EcoReef 100

12" x 2" x 4"

Premier 175/200/300/400, All RedFlex 200's, EcoFeef 200

14.5" x 2" x 4" 

All RedFlex 300/400's, EcoReef 300/400

18" x 2" x 4"

RedFlex 600's