Excellent for retaining filter media: 

BioBalls, ribbon media, zeolite, etc. 

¼” white mesh with draw cord and slide-lock.

Lok41: 12” x 12”

Lok42: 12” x 18”

Lok43: 12” x 30”

Lok44: 18” x 24”

Lok45:  20” x 30”

Lok46:  24” x 36”