Masking Controller STS410 Custom Masking Controller STS410 Custom Controller STS410 Custom Controller Custom push button control plate – designed and built based on the amount of stops in a system. STS408 Five Stop Controller STS408 Five Stop Controller STS408 Five Stop Controller Five stop push button control plate. STS407 Two Stop Controller STS407 Two Stop Controller STS407 Two Stop Controller Two stop push button control plate.