Non-metal pipe couplings and joints; Insulation jackets for pipes; Sealing plugs made primarily from rubber; Heat shrink nylon tubing for covering electrical wire and nylon grommets; Thermoplastic heat shrinkable tubing for managing electric cables; Non-metal pipe muffs; Insulating sleeves for power lines; Polytetrafluoroethylene (PTFE) thread seal tape; Plastic tubes for protecting electrical wires