Available for GN 960 and 961 metric size Angle Brackets for aluminum T-slot profile systems, metric size GN 963 Cover Caps feature RoHS-compliant, matte black Polyamide PA plastic construction. Cover caps, which come in 3 sizes and snap into place via 4 lugs after angle brackets are assembled, give angle bracket finished appearance and protect against dirt. Despite repeated use, products remain firmly in place inside angle brackets.