Descriptions: This particular extrusion has a flat profile and is suitable for installing all range of LED tape products up to 12mm in width. Simply fix the extrusion into place using the included fixing clips and then stick the tape into the extrusion. The opaque diffuser is a slide in type so should be attached before the extrusion is clipped down. Specifications: Size: 18*15mm (W*H) Aluminum grade: 6063-T5 Anodization IP Rating: IP20 Available Length: 1/2/2.5/3/4/6 Meters Available Color: Silver Anodized, Black & White Painting