This is Team Associated's Factory Team Droop Gauge. This is used on any electric/gas, truck or car. Black plastic, gauge readings read from 0 to 8. One black Droop gauge Instructions Nothing Length: 5-1/2" (140mm) This Droop Gauge is to let you show how far the A-Arms (suspension arms) droop at maximum rebound. Just follow the instructions that come with the droop gauge. dew 6/1/02 ir/kh &