Roll-Up Side Kit for Hobby Greenhouse Pumps & Irrigation [Lightweight] Viagrow horticultural perlite is

[Lightweight] Viagrow horticultural perlite is a light substitute for sand

So whether you are wall hanging

lobster compost

In addition to calcium

all in one mobile unit

Roll-Up Side Kit for Hobby Greenhouse Pumps & Irrigation [Lightweight] Viagrow horticultural perlite isIncrease airflow and manage heat in your Hobby Greenhouse with roll up sides. Turn the handle to raise or lower the plastic sidewalls and fine tune your climate control as temperatures shift. Features Roll up bars for ventilation and temperature control Easy turn handles for manual operation Webbing and strap system secure sides open Works with optional insect netting for pest management Improves air circulation and reduces humidity build up Included