For 12 Piece Diesel Engine Compression Tester Gauge Tool Kit 12 pc deluxe compression tester kit for diesel engines. For direct and indirect engines Dual scale guage Glow plug adaptors M10X1.0 M10X1.25 M12X1.25 M14X1.25 Dummy injectors M20X1.5 M24X2.0 Replacement seal and washer set 90 degree elbow Clamp plate