10 x Wiska Sprint IP68 M20 black glands to fit cable diameters 7.5mm - 14mm includes Locknuts, Cable compression glands each complete with locknut M20 - 20mm thread size Waterproof rated up to IP68 Black colour Ideal accessory for junction boxes etc or anything where inserting a cable could cause water to enter into live electrics,using the correct IP68 rated cable compression gland will ensure the item stays waterproof.