AMPS Standard Dimensions
Our 20mm AMPS-ball takes advantage of the industry-standard AMPS pattern of 30mm x 38mm which means a perfect fit with any 3rd party base that also uses this AMPS standard pattern. In addition, this 4-Hole 20mm AMPS ball is also perfectly compatible with any of our RubiGrid bases as well as any mounting bases that feature an AMPS-compatible mounting location in the center of the base such as our Ford F-Series and Ford Ranger bases.