25lb

#20-G has the same properties as #20 with a fine grog added for slightly less shrinkage and improved workability.  

Cone: 06  Wet Color: Red  Firing Color: Oxidation: Terra Cotta - Reduction: N/A  Texture: Medium Coarse  Avg. Shrinkage ±2%: 8.0%  Avg. Water Absorption ±1%: 11.5%  COE x 10-6: 4.80