Our Product Spectrum Billets A Billet is a semi-finished steel form that is used for "long" products: bars, channels or other structural shapes. Features & Specifications Size Range • 100 x 100 mm, • 125 x 125 mm, • 160 x 160 mm, • 250 x 250 mm squares. Length – upto 12 Metres. Rhomboidity – 5mm (max)