We have both poly (PP) and  nylon(PA) for this bristle block.

For different manufacturing  environments, please adopt the proprt material:

PP Bristle Block is not easily deformed, suitable for cutting lighter textile fabrics, used in hot and wet environment without air conditioners. Many Vietnam clients like this material.

Nylon Bristle Block is more durable,  suitable for cutting thick and heavy textile. It is more widely used in cold and dry environment.