Our fiber glass block has below sizes available. There are white and black colors. 

 8*8*2000mm

10*10*2000mm

10*12*2000mm

10*15*2000mm

It is a new material made by reinforced glass fiber. Due to high production volume and excellent performance,it has replaced side strips which are made by bakelite and FR4 material.It is specially used in wave solder pallet,PCB fixture and jigs. The main function is to block PCB from tin flow during the soldering process. 

-Tin flow block bar of solder pallets