This washer is steel-based, a sintered porous bronze particles interlayer and calendered with PTFE and filling mixture as surface layer.
It is low friction, anti-wear, anti-corrosion and can be used without lubrication. Moreover, it is low-cost, low vibration and low noise.
SF-1 is widely used in various sliding motion of different kind of machines such as printing machines, textile machines, tobacco machines, gymnastic machines, hydraulic vehicles, automobiles, motorcycles, agriculture and forests machines and so on.

It is a lead-free product.