Protram
Protram Remonty i Modernizacja Tramwajów Protram Wrocław Sp. z o.o. was a Polish company that specialised in production and modernisation of rail equipment. The company was founded in 1999 in Wrocław after the rail maintenance department of MPK Wrocław was privatised. The company filed for bankruptcy in 2016 and was eventually liquidated.
Products
There are 3 models of trams constructed by Protram:They are responsible for the modernisation of Konstal 105Na units into Konstal 105NWr as well.