Techno Forge Limited manufactures Forged type Hollow Bars. Techno Forge Limited is an ISO 9001: 2000 accredited company offering a wide range of forged flanges and shipping products. The Forged type Hollow Bars are used in various industrial applications and is available in various lengths ranging from 100 mm to 1000mm. The Hollow Bars comes in different punch sizes ranging from a minimum of 100mm to a maximum of 1750 mm.