The glass is either opal

Matt brass finish

without using an abrasive sponge to dry it carefully

or petrolatum

porcelain wall end plug socket matt white FINISH:WHITE SCREWS The glass is either opalModern UK wall socket manufactured in Europe by Katy Paty. Re designed retro end plug. Made of traditional porcelain. Dust resistant. Constant colour and highly abrasion resistant surface. Enamelled and handmade in top quality. CE conformity certificate. Decorative cover. Guarantee 50 years. The diameter of the central hole is 8,5 mm, the minimum pitch of centres of concealed installation boxes is 100mm (min. 95mm), boxes depth is 43mm. For connection