Spec-Sheet
Retractable Yellow Steel Bollard - 4" x 36" Drop-Down Security Post
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Over 50 years in the industry, demonstrating reliability.
Serving customers across all 50 states.
Products designed for heavy-duty use.
30 Days Return Policy*
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Product Overview
Retractable Yellow Steel Bollard - 4" x 36" Manual Drop-Down.
Block traffic when you need to. Let it through when you don't. This 4" retractable bollard drops flat into an in-ground sleeve for vehicle access, then locks upright for full perimeter security. Q235 carbon steel post with safety yellow powder coat. SS304 stainless steel sleeve protects the mechanism underground.
Standing 36 inches above grade when locked, the bollard retracts fully into its 42" deep in-ground sleeve when access is needed. Safety yellow finish and integrated reflective strip keep it visible day and night.
Review the Product Details below to confirm the correct size, material, mounting style, color, and configuration before ordering.
Key Features
- Manual drop-down operation. No power, no hydraulics, no maintenance.
- 4" carbon steel post. Strong impact resistance at a lower price point.
- SS304 stainless sleeve. Underground housing won't corrode.
- Reflective strip included. Visible at night without additional lighting.
- Safety yellow powder coat. High visibility for traffic control zones.
- Controlled access. Let authorized vehicles through, then lock it back.
- Impact resistant when upright. Same protection as a fixed bollard.
Ideal For
Choose this product if you need:
- Facility safety and traffic-control applications.
- Industrial or commercial areas needing visible protection.
- Projects where the listed dimensions and options match the site.
Not Ideal For
Not ideal if the listed size, mounting method, or configuration does not match the application. Verify all product details before ordering.
Product Details
| Brand | S4 Bollards |
| Product Type | Bollard Accessory |
| Part Number | BMRCSY436 |
| Diameter | 4" |
| Above Ground Height | 36" |
| Total Depth | 42.5" |
| Material | Q235 Carbon Steel |
| Sleeve Material | SS304 Stainless Steel |
| Finish | Safety Yellow Powder Coat with Reflective Strip |
| Reflective Strip | Yes |
Frequently Asked Questions
What is this product used for?
This product is used for bollard accessory applications where the listed size, material, and installation style match the site requirements.
How do I choose the right option?
Compare the SKU options, dimensions, mounting method, color, and product details shown above before selecting an option.
What should I check before ordering?
Verify measurements, surface conditions, installation requirements, and whether hardware or professional installation is needed for the application.
Return Policy
You can return unused or defective products up to 30 days from the date of order. Some product returns may be subject to restocking fees. Proof of Purchase will be required if we cannot verify your order information. Unless the product is defective or damaged in transit, the customer is responsible for return shipment costs.
Defective or Damaged Products
All shipments received must be immediately inspected for damage. If your order shipped on a freight carrier, any damage needs to be noted on the Freight Receipt before signing for the delivery. An exchange or refund will be provided at no additional cost. If damage is due to misuse or regular wear of the product, the return will be denied.
Order Cancellation
If you need to cancel your order for any reason, please contact us immediately. If the order is canceled prior to shipping, you will be refunded in full. Certain products that are manufactured to order cannot be canceled after the manufacturing process has started.