Extruded Saddle Is Reversible to Match 1/4" and 3/4" Door Clearances Dry Glaze Push-In Top Load Glazing Gasket Several Finishes to Match CRL Door Rails RED-E to Ship Models From CRL Inventory CRL 4 inch Square Sidelite Rails for 5/8 or 3/4 inch (16 or 19 millimeters) glass match the profile of our 4 inch Square Door Rails for 3/4 inch (19 millimeters) glass,thus leaving an even sightline. They match floor mounted and 1/2 inch (12.7 millimeters) threshold doors using our Reversible Saddle. Use the Sidelite Rails alone as upper rails, and with our Aluminum and Neoprene Setting Blocks, lifting the glass into the upper rail and lowering it into the bottom rail. This allows 9/16 inch (14.3 millimeters) retention in both top and bottom channels. Roll-In Glazing Gasket for 3/4 inch (19 millimeter) glass is included. Both 5/8 inch (16 millimeter) Roll-In glazing Gasket and End Caps are sold separately. Our policy for Quick Pick products is as follows: These products are stocked in our centralized warehouse, and upon your order will be shipped on our next re-supply truck to your regional CRL warehouse. Re-supply trucks ship every week, so if your regional warehouse does not have stock of the product you require, your order can be filled in just a few days. You can check the stock availability of any CRL product when you click on the box above marked "CHECK STOCK AVAILABILITY".