These systems can only be fastened by adhering (glue or double-sided tape). Adequate adhesive is available from specialised trade. The following materials can be found at the rear: A18B-Ks: Polyamide (PA) A22B-Ks: Polyamide (PA) A31B-Ks: Galvanised steel AS031NdB-00s-03: Polyamide (PA) A43B-Ks: Polyamide (PA)