Item Type: Air-conditioning Installation High and Low R134A Quick Coupler Adapters Compatibility: R134 Scope of application: Car Add Fluorine Degrees Connectors:180 degree Side fitting for A/C manifold gauge set (R134A) type. colour:Red + blue Material:brass size:Blue Inside diameter:14 mm Red Inside diameter:17 mm Package Contents: 2 x Quick Coupler(With Cap) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.