Garden shed series keter manor floor area 25 m width base dimensions 130 cm depth base dimensions 193 cm internal dimensions 111 x 177 cm eaves height 168 cm wall thickness 16 mm number of rooms 1 dimensions in feet 4x6 ft room size 4 m material plastic colour grey roof shape saddle apex roof roof thickness 16 mm door type single door number of doors 1 door door size h x w 64 x 159 cm number of windows 1 window dimensions w x h