Bio Block holder compatible with Maxspect & Mantis Bio media Blocks..Each holder fits 4  bio blocks

Allows for Vertical or Horizontal use.

Easy to use , easy  to clean , looks great in your sump. A must have for a professional looking Sump area. Another great 3DReeF product.

Made From PETG plastic compleetly reef safe.

Many colours to choose from.

BioBlocks not included.

Size

Whidth      4.5inches        115mm

Depht        2.9 inches       74mm

Height       5.9 inches       150mm