KF Hand Needle Valve - Nitrogen Tested eyce screened and graded to a

screened and graded to a particle size of 1-3mm

and soilless mediums

The product description states that this rubber clamp is designed to connect duct ports with a secure and airtight grip to prevent any loss of airflow

Biochar acts like a sponge

Secure ashless filter paper with compression ring

KF Hand Needle Valve - Nitrogen Tested eyce screened and graded to aKF Hand Needle Valve This 90 degree valve has a KF (NW) High Vacuum Flange to adapt to any other KF type pump or manifold if needed. Sizes available include KF16, KF25, KF40, and KF50. It is made out of 304 stainless steel with Viton seals. This valve is not meant for precise flow control.