7.5 LBS 4A Molecular Sieve, Premium Quality Desiccant Bulk Material

4a molecular sievesTwo experiments:30 GM to startPoured 5x the apparent volume in water, fizzed.Dried3x on paper towels. Probably lost ~ 30 beads.Weight:40.41gm. Aluminum lasagna pan, convection oven set to 500c start time: 9:45pm.End time 10:45pm . After 1hr in oven weighed30.4 GM.Put Hygrometer that reads down to 10% into polyethylene bag filled with air. Hygrometer read 40%.Added above cooked beads to bag and checked in morning. Hygrometer read 10% (lowest it could read).

I bought 3a and 4a from them, used them to dry solvents, leave in and store, and remove water from reactions. They work great. If I ever run out of them or find I need more than 7lbs in rotation I'd absolutely order more.

For first time users, it will be best if they had scales shown next to the item. Picture and unit described it's hard for new users to understand how big the unit is. If item has been poured out of the container and placed next to a ruler, it will help the buyer understand better the size of these pellets.

Fit perfect and looks awesome

Exactly as featured

(4A) So basic tests with water and dehydrating it came out very good. I passed the heat stress limits of glass while drying and broke that. Aluminum is doing ok. After activating, no matter dry or "used" these seem to always give off some heat so have proper storage containers after activating. Convenient double handle make's spills less frequent. I've noticed a 5-10% decrease in humidity compared to normal Silica Gel.(13X) 100% easy oxygen concentration levels if your rig is right.

Using it in a filter for a pcp airgun.Works as designed