Plugs from ESSVE are used for mounting in porous materials such as concrete, lightweight concrete and brick. ESSVE recommends the following: ESSVE GXL. Combined screw and plug. For mounting in most materials. ESSVE nylon plug N. For hard materials such as concrete, natural stone and brick. ESSVE nylon plug NL, suitable for lightweight concrete and lightweight clinker, types Leca and Siporex. ESSVE universal plug, expands to different degrees depending on the material the plug is used in. ESSVE clips plug, for cable clips. ESSVE plastic plug, double expanding plug that prevents crack formation.