Top Shelf Black Hdpe Round Bollard Post Cap Featuring 5 Inch Outside Diameter Fits Four Inch Tubes Built Tough With Killer Concrete Fill Gasket For Knockout Parking Lot Guard Rails

Heavy Duty Black HDPE Bollard Cap Protects 4 Inch Tube
✔️ 5 outer 4 inner dimensions black hdpe concrete base seal

This pack single heavy duty guard rail cover seals off exposed steel tubing to keep rainwater, dirt, and debris out of hollow frames. Works great on commercial parking lots, warehouse aisles, and driveway entry points where plows and carts regularly bump into posts.

✅ Fills 4 inch round tubes with quick set concrete for solid anchoring
✅ Black high density polyethylene stands up to sun exposure and salt spray
✅ Swaps directly onto Eagle 1742, 1743, and 1744 barrier mounts

💡 What makes a concrete fill cap handy for shielding metal guardrails?
This slick upgrade locks down weak tube ends and keeps maintenance cheap.
- Stops rainwater from rusting out hollow frames before winter hits
- Adds serious ballast so traffic swings bounce off instead of bending rods
- Slides right over 4 inch OD tubing with zero heat cutting required
- Keeps snowplow edges from chewing up bare metal on busy aisles

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