WonderPana 145 Essentials Kit - 145mm Filter Holder, Lens Cap & CPL Filter for Canon 8-15mm EF f/4L Fisheye USM Lens (35mm) Premium Grade Anodized Aluminum WonderPana145 Core Unit High Quality, Double Threaded, CPL Filter - Made of Optical Glass 145mm x 1mm Standard Thread Enabled Included Finely Crafted, Heavy Duty Inner Pinch Lens Cap 24-Month Manufacturer Warranty