Material: rubber and metal, strong sealing, easy to use and install Complete kit: 8 in 1 air conditioning hose adapter: Ideal for R134a and R12 vehicle air conditioning systems 8 Piece Automotive Air Conditioning Refrigerant Replenishment Hose Adapter Size: 7 or 16Mx5 or 16F, 7 or 16Mx3 or 8F, 7 or 16Mx7 or 16F, 7 or 16Mx3 or 8F, 7 or 16Mx5 or 16F, 7 or 16Mx5 or 16F, 7 or 16MxM9, 7 or 16Mx 3 or 8F Front Placement on Vehicle, ideal for converting auto self-propelled gauges to just about anything Features: - Blue 1 or 4andquot M to 7 or 16andquot SAE F, with valve core and swivel. Used for low R12 side port. - Red 1 or 4andquot M to 3 or 8andquot SAE F hose adapter, with valve core but without swivel. Used for R12 side port. (On this one, the seal inside mine is a little warped.) - 90 degree 1 or 4andquot M to 7 or 16andquot SAE F adapter. With valve depressor . R12 low. - 90 degree adapter 1 or 4andquot M to 3 or 8andquot SAE F. With valve depressor. R12 hi. Some older vehicles had the same fittings on both the low and hi sides, so having two adapters is helpful. - 90 degree 1 or 4andquot M to 1 or 4andquot F adapter. With valve depressor. 90 degrees are good for accessing ports where there is not much clearance. - 1 or 4andquot M to 1 or 8andquot NPT M straight adapter. With valve core. Can be used on gauge manifold. - Straight 1 or 4andquot M to Metric 9x1mm M adapter. With valve core. No idea what itand 39 s for. - Great adapter. Male 1 or 4andquot fit is fine, female fitting is too small for 1 or 2andquot ACME, feels loose on 1 or 4andquot flare. Has a valve depressor. Package includes: 2 x Flexible adapters 3 x 90 adapters 1 x Adapter height side 1 x male adapter 1 x Adapter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store