ITEM NAME:Oil/Dye Injector 30Ml 1 Oz with Low Side Quick Coupler Adapter 1/4 SAE R134 E3S6 Oil/Dye Injector 30Ml 1 Oz with Low Side Quick Coupler Adapter 1/4 SAE R134 E3S6 Special Features: oiler Low-Side Quick Coupler Adapter. Use for: Air.1 30ML filler. Low-Side Quick Coupler Adapter. If you are working on a system with different port size, you may need to have an adapter to finish the job. One shot may cure and save a sickened compressor caused by low oil.