The lamp holder kit requires 3x0,75 cables.

E27 metal lamp holder kit with double ring nut:
Sleeve: threaded
Dimensions:
Diameter: 40 mm
Height: 55 mm
Diameter of ring nut: 60 mm
Fuse: polyester thermoset T230 (maximum operating temperature)
Nominal voltage: 250 Vac
Rated current: 4 A
Terminals: screw terminals for rigid or flexible cables from 0,5 ÷ 2,5 mm2
Fixing: with M10x1 threaded hole

Technical specifications of cylindrical cable clamp:
Cap size: diameter 13 mm - height 17 mm
Cap material: metal
Threaded tube size: diameter M10x1 - height 15 mm
Threaded tube material: metal

Technical specifications of conical cable clamp:
Height: 43mm
Diameter: 14.8 mm
Material: thermoplastic