Different sizes: PG7 (36.5 mm) / PG9 (48 mm) / PG11 (510 mm) / PG13.5 (612 mm) / PG16 (914 mm) 5 sizes per set , from 25.^ Durable Material: The cable gland uses high quality IP68 waterproof nylon PA6 fire protection and lock nut gaskets to seal your wires to ensure alkali, acid, dust and shock resistance of cable.^ [Adjustable Design] Adjustable cable connector, the design is perfect for effortless grip, waterproof and sealed. The multi-thread design ensures safe, quick assembly and a permanent lock nut fit.^ Easy to use: the compressed cable gland does not need to be disassembled. The cable entry can be inserted directly and then easily tightened.^ [Application] Nylon cable connectors for all weatherproof electrical equipment, such as sockets, switches, junction boxes, distribution boards and cable ties. Strong tensile strength, will not damage cables or equipment.^