... 200 is for assembling Bonnell springs.This spring mattress machineryFeatures include:1. Can be operated ... Accepts different steel wire gauge, spring end ring, spring height and produces spring units within a certain limitation ... and clamped at both ends automatically.5. Spring rows can be set on the computer, ... -480V, 220V) mattress machine--Bonnell spring machine--SX200 AUTOMATIC SPRING ASSEMBLING MACHINE