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The classic beginner bag sealer! Timer switch to dial in your sealing. Hand operated, simply press down the arm and seal the bag. 300mm wide (suitable for most bags, unless flat folded).  

It's perlite.  From our suppliers website "Perlite is a naturally occurring volcanic rock which, when heated to high temperatures, produces lightweight micro-porous granules." which is pretty cool sounding. Perlite is generally used in shotgun fruiting chambers to create a humid...