Sandbags Pile 2
Sandbags are not very sturdy but can be put down quickly and provide decent protection from bullets.
Crafting
Craft at Backpack · makes 1
Crafted as 
Sandbags: pick this one of its variants when you place it.
Crushed Sand× 4
Cloth Fragment× 15
Harvest drops
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
Where to find (21 POIs)
Hybrid Mining (tier 5), Navezgane County Jail (tier 5), Aranea Caverns (tier 4), Camp Hollow Point (tier 4), Downtown Marketplace (tier 4), Fort Camo (tier 4), Navezgane High School (tier 4), NDC Checkpoint Three (tier 4), Richard Munchz Plaza (tier 4), Stand Tower (tier 4), Fort Razor (tier 3), Law & Order Square (tier 3), Weston Weigh Station (tier 3), Mobile Field Hospital (tier 2), Pal's Marina (tier 2), The Shady Swine (tier 2), Radio Outpost (tier 1), Skamson Grocery (tier 1), The Book Barn (tier 1), Camp Bravo, Outlaw Outlets.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.