All Collura & Co. pieces are individually crafted by hand. Although we diligently strive to match our finish samples, tear sheet images and web images to the final product, slight variations in color, tone and texture of materials may occur. Hand-blown glass will have a small degree of variation from piece to piece as will hand-executed metal finishes. All efforts are made to keep variation between components to a minimum. Collura & Co. fixtures are fabricated with U.L. listed lamping components whenever possible. Official U.L. listing and labelling can be specified for certain fixtures at an additional fee. COM: Technical requirements for shade fabrication and textile usability are varied and depend on shade style and fixture application. COM samples must be submitted to Collura & Co. for preliminary testing and full yardage requirements must be received before lead times begin. We make every effort to properly utilize COMs, but even favorable testing results do not guarantee that COM selections will result in successful shades until the fabrication process is completed.