[R134A CHARGING HOSE] The R134a Charging Hose is 19.68 inches long with a 2.75-inch air conditioning gauge. It connects an R-134a can to an R-12/R-22 service port. The 1/4 inch end fits R12, R22, and R502 fittings. The gauge includes scale readings for R134a, R12, and R22. [BPV31 PIERCING VALVE] BPV31 Piercing Valve for HVAC systems. This 3-in-1 line tap piercing valve fits three sizes of tubing: 1/4 inch, 5/16 inch, and 3/8 inch. [ADAPTER] 1/4 inch to 1/4 inch adapter with valve core. Includes a 1/4 inch male to 5/16 inch female adapter, compatible with mini split system air conditioners, HVAC, and refrigeration systems. The replacement part is made from durable, high-quality materials. Color: blue, copper-colored Material: plastic, metal Package Contents: 1 x R134a hose 1 x BPV31 piercing valve 1 x R134a low-side quick connector 1 x 1/4 inch to 1/4 inch adapter 1 x 1/4 inch male to 5/16 inch female adapter Only the above items are included; other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.