Wheels Scaffolding [India] Ltd. Supplies Adjustable U-Head Pipe of 38mm. Wheels Scaffolding [India] Ltd. Is accredited with ISO 9001-2000. The Adjustable U-Head Pipe of 38mm can be used at either the top or bottom of a scaffold support structure in building and construction industries. It can be supplied with welded base plate or U type Stirrup Head.