MATERIAL: cord grip connector is made of nylon PA66 plastic, durable.NPT 1/2 25PCS/SET PP Plastic Box. WIDE APPLICATION: Nylon gland wildly use to cable fixing, wire splices, machinery control boxes, distribution panels and electrical appliances and so on. HIGH QUALITY:Wide adjustable cable range 6-12mm and special design of the clamping die and rubber part combine with strong stretching resistance ensure no damage to cables and devices. STRONGLY WATERPROOF IP68: flat cable gland has gaskets for the clapboard mounting; Gasket makes a seal against the inside of the surface to make the waterproof function come true. EASY TO INSTALL: cable grip gland connector can be inserted through directly, and can be tightened easily without disassemble.