2 1/2IN silicone dampened, recalibrateable gauges Extra access port for vacuum line R1234yf high and low side quick couplers R134a high and low side economy couplers 1/2IN acme-m x 1/2IN acme-f LH thread adapter (2) 12 mm-m x 14 mm-F R1234yf adapters Set of 3 ñ R134a standard hoses 66636-AYF: R1234yf/R134a brass manifold gauge set, 2 1/2 IN gauges, 3-36 IN R134a standard hoses, R134a economy couplers (66234, 66334), R1234yf quick couplers (67434, 67534), 1/2 IN acme-m x 1/2 IN acme-f LH thread adapter (83633), (2) 12 mm-m x 14 mm-f R1234yf adapters (83735) 66661-AYF: R1234yf/R134a brass manifold gauge set, 2 1/2 IN gauges, 3-60 IN R134a standard hoses, R134a economy couplers (66234, 66334), R1234yf quick couplers (67434, 67534), 1/2 IN acme-m x 1/2 IN acme-f LH thread adapter (83633), (2) 12 mm-m x 14 mm-f R1234yf adapters (83735) 66672-AYF: R1234yf/R134a brass manifold gauge set, 2 1/2 IN gauges, 3-72IN R134a standard hoses, R134a economy couplers (66234, 66334), R1234yf quick couplers (67434, 67534), 1/2 IN acme-m x 1/2 IN acme-f LH thread adapter (83633), (2) 12 mm-m x 14 mm-f R1234yf adapters (83735) R1234yf/R134a REPLACEMENT GAUGES: 85500-AYF: 2 1/2IN high side gauge, PSI/ DEG F, R1234yf/R134a refrigerant scale 85350-AYF: 2 1/2IN low side gauge, PSI/ DEG F, R1234yf/R134a refrigerant scale