These unique cable clamps incorporate a unique sealing mechanism which works on the camera shutter principle. Simply mount the clamp, insert the cable through and tighten up. There is no need to disassemble the clamp prior to installation. These clamps are rated to IP68, the highest rating possible. They are totally dust tight and protected against submersion in water. Pack of 2 Suitable for marine applications Unique sealing mechanism Durable IP68 rating No need to disassemble prior to installation Sealed and protected from dust and water Qty per pack: 2 Available sizes: 3-6.5mm, 4-8mm, 5-10mm, 6-12mm, 10-14mm, 13-18mm Thread size: M20 x 1.5 thread