• Adjustable sizes 1 through 6.
• Meets or exceed ANSI A156.4 Grade 1 requirements
• Compliance with building and barrier-free codes
• Up to full 180 degree door opening
• Unique pressure-relief backcheck intensity valve
• One-piece seamless steel spring tube seals in hydraulic fluid
• Tapered valves allow precise adjustment
• Cast iron body
• QUIK-INSTALL(tm) mounting brackets speeds installation, reducing cost and errors