EFINEHOME Efine Black Period Style 2 Pack E26 E27 Socket Screw Bulbs Edison Retro Pendant Lamp Holder (Style A) Rated current: 4(A);Rated voltage: 250(V);Have CE certification Material: metal + heat resistant plastic 2 Pack Plastic Strian Reliefs as a gift Edison Screw 27\26mm screw socket. It has a 40mm ring thread with lamp shade collar that can be removed to allow the fitting of a lamp shade