Gardner Bender 4-in Knockout Seal

Gardner Bender 4-in Knockout Seal Features:

• Fast and easy to install from inside or outside of box.
• Embossed for quick self-centering in unused knockouts.
• One screw holds seal in place.
• Made of rust-proofed, cold-rolled galvanized steel.
• Screw and bar are zinc-plated.
• Marked for size and catalog number for easy installation.
• 16-gauge steel; 3/8-in thread.
• Dimensions: 5.75-in (L) x 5.75-in (W) x 1.13-in (H).