The BR 21-ton mineral wagons were introduced by BR between 1950 and 1960, and had a long-lasting service life hauling coal, ore and other bulk material. 
The Hornby TT:120 model of this useful open wagon is an authentic and highly detailed replica, and perfect for running behind steam engines late in their career, or British Rail era diesel locomotives like the Class 31 and 37.
TT6060 represents a triple pack of BR grey 21-ton mineral wagons, with ‘Coal 21’ TOPS code and numbered B315885, B315893, and B315897.
Model Specification:
    Crisp body panel detailing
    Detailed underframe
    Separately fitted brake equipment
    Kinematic NEM couplings
    Recommended for use on 2nd radius curves or higher, but capable of traversing 1st radius
Tooling:
    Without top doors
    RCH 4-clasp brakes
    Tiebar
Livery:
    BR grey
    TOPS markings
    Authentic colours and fonts
    Era 7