CRL Aluminum Replacement 'H' Bar can be used in place of other manufacturer's 'H' Bar. Designed for use with 3/16", 7/32", and 1/4" (5, 5.5, and 6 mm) materials. 3/16" (5 mm) glass doors require the use of D752 Vinyl; 7/32" (5.5 mm) glass doors require the use of D749 Vinyl. If using 1/4" (6 mm) glass doors, it is recommended that the glass be wet glazed into the 'H' Bar for proper fit. You can use either the D5650 Nylon or D5649 Steel Wheel Units with this 'H' Bar.