New and unused. The boxes do have some wear and dust from storage but the contents inside are still new. This is of the variety with the heavy duty arm. I have a few of these and a few of the ones with the "standard duty" arm" as well as some of both that are missing their arm. If you'd be interested in more than one, feel free to reach out to me and we can make some sort of deal!
Here is some information summarized from Stanley's official literature about the product. You can find some of this info in the last several listing photos as well, or I can also send you a link to the actual pdf from Stanley:
STANLEY D-4550 Series Heavy Duty Door Closer – Grade 1
Product Overview
The STANLEY D-4550 Series is a premier heavy-duty door closer designed for high-traffic institutional and commercial applications. Built with a high-strength R-14 Silicon Aluminum Alloy cylinder body, it offers superior durability and performance that exceeds ANSI/BHMA Grade 1 requirements.
Key Features
Heavy Duty Construction: Manufactured using R-14 Silicon Aluminum Alloy for maximum strength and wear resistance.
Fully Hydraulic Control: Provides complete control through the opening and closing cycles with adjustable backcheck, general speed, and latch speed.
Non-Handed Design: Can be used on both Right-Hand (RH) and Left-Hand (LH) doors for push or pull side mounting.
Adjustable Spring Power: * D-4550: Adjustable from Size 2 to 6 (Meets ADA 5lb opening force requirements).
D-4551: Adjustable from Size 1 to 5.
All-Season Fluid: Eliminates the need for seasonal adjustments due to temperature changes.
Maintenance Free: Designed to be maintenance-free when installed according to instructions.
High Impact Cover: Includes a self-extinguishing decorative cover to protect the mechanism and provide a clean look.
Technical Specifications
Certification: ANSI/BHMA A156.4 Grade 1 Certified.
UL Listed: U.L. and C.U.L. listed for self-closing doors without hold-open.
Fire Safety: Tested to meet positive pressure criteria of UL10C & UBC 7.2.
Piston Diameter: 1-1/2" cold forged heavy steel construction.
Pinion Shaft: 5/8" diameter with 13 teeth for high durability.
Mounting & Applications
This closer is shipped with "Tri-Pack" packaging, allowing for three standard mounting options in one box:
Standard (Pull Side)
Top Jamb (Push Side)
Parallel Arm (Push Side)
Available Finishes
689: Aluminum (Painted)
690 / 695: Dark Bronze (Painted)
691: Light Bronze (Painted)
693: Black (Painted)
696: Satin Brass (Painted)
The STANLEY Ryobi D4551 Heavy Duty Door Closer is a durable and reliable option for various types of doors including residential and commercial. Made of materials such as stainless steel and aluminum, this door closer is built to last. It comes with a hold open arm for added convenience and can be universal/reversible for use in different door handing situations. The included items like drilling template, fasteners, and hardware make installation easy. This door closer is suitable for a wide range of applications and is a quality product from the trusted brand, Stanley.