Sidelite Rails Sidelite Rails maintain a seamless, consistent appearance when used with matching door rails. Available in standard or custom lengths, the dry-glaze installation is fast and efficient. Square 2-3/4" Rails (SRS-275) Square 4" Rails (SRS-4) Tapered 4" Rails (SRT-4) Square 6" Rails (SRS-6) Square 10" Rails (SRS-10)