From the Manufacturer
John Sterling Corporation Bi-Fold Door Hardware Kit #RP-1534 for 4 Door Opening up to 72″. Kit includes 2-36″ White Tracks and Hardware for 4 1 3/8″ Doors.
Product Description
BI-FOLD DOOR SET – 4-door set adjusts from 48″ to 72″ ~ For 7/8″ to [...]