... 3)Good quality bonnell pocket s pocket spring for sofa cushion We are the manufacture for production Pocket Spring, Massage pocket ... spring, Zoned mattress spring, Inner spring, Pocket coil, Pocket Cushion Spring, Sofa Spring, Seat Spring, furniture spring,, Zigzag spring,coil ... perfect. Two different size of spring are translated, which can reduce the tossing arising from your neighbor sleeper.