... accessoreis of stainless bolts and nuts,expension screw,suspender rod normal type and size: 1)Grooved ceiling grid tee ... spspension and wall partition work.our products are featured with light-weight, long lifetime, high durability, rust resistance, easy ... and so on.here is the full set of light steel keel and accessories for the fause ceilings ... of stainless bolts and nuts,expension screw,suspender rod