In twisted-in-wire brushes, the filament material is twisted between two wires. This type of brush is primarily used to clean the internal walls of pipes.
Like all other Brush India brushes there is a wide range of possible filament types. The middle of the brush consists of what is called the ‘soul’, which is usually made of two twisted wires. The thickness of the twisted wires can vary. It determines the strength as well as the fill density of the brush.
Types of Spiral :
Single Spiral Your choice of fill bristles are twisted between two (2) stem wires
Single Spiral Double STEM Your choice of fill bristles are twisted between four (4) stem wires
Double Spiral – Double STEM Two (2) layers of your choice of fill bristles are twisted between four (4) stem wires.