Mortised Soundproofing Astragal for Gaps between Double Active Doors, TMSoundproofing.com
French Door Solutions | French Door Astragals | Multi-Point Astragal
Replace double door center weather stripping - DIY - YouTube
Acoustic Double Door Astragals - Acoustical Solutions
T- Astragals for Your Double Door Heavy Duty - Satin Anodized Combination Astragal and Flush Bolt Assembly. Double Door Seal Closer - Double Door Central Lock - Passive Door Lock (White 80 Inch) - Amazon.com
Aluminum Smoke Acoustic Double Door Seal - China Door Frame Seal, Astragal Seal | Made-in-China.com