3-10FT Bi-Folding Sliding Barn Door Hardware Kit, Heavy Duty Roller Track Kit For 4/2 Doors Side Mounted ,Easy to Install

5.5"/14cm Clearance needed above the door Door thinkness:1.18-1.77" /3-4.5cm Each door panel width half of door openning width+2"/5cm Weight capacity:300lbs/150kgYou may also like 2/3/4 Unit Multi Apartments Intercom Video Doorbell With RFID Card Unlock 7inch 4Wired Video Door Phone System ,Easy to Operate.