Usage Tips:R12 to R134A Conversion Kit: you will get 1 x 90 low side R12 to R134A convert adapter, 1 x 90 high side retrofit adapter, 1 x low pressure side AC fitting port retrofit adapter, 1 x high pressure side AC fitting port retrofit adapter, both fitted with a dust cap; Besides, with 2 x valve core removal tools, easy and fast to install Quality and Sturdy Material: the 90 R12 to R134A AC fitting adapter kit is mainly made of quality brass material, and the straight type convert adapter is mainly made of aluminium alloy, they feature good sealing property and heat resisting property, sturdy and not easy to rust, and the leak proof design is reliable to use Good Compatibility: the high/low pressure R12 to R134A retrofit kit is compatible with 1/4inch female to 7/16inch-20 UNF connection, and accept R134A quick disconnect hose Suitable Size: the low side (blue cap) is 1/4inch (7/16inch-20) x 13 mm, and the high side (red cap) is 1/4inch (7/16inch-20) x 16 mm, proper size to easily install, saving your energy Practical Use: 2 pieces of 90AC fitting port retrofit adapter and 2 pieces of straight type AC fitting port retrofit adapter can be widely applied for most occasions, perfect your AC air conditioner refrigerant; And there are equipped with valve core removal tools, which easy to remove the valve core Colour:Photo Color Material:Metal Package Contents: 1x AC Fitting Conversion Adapter Kit Only the above package content, other products are not included. Note: Light reflection 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.