1 The dye injector can be used with the manifold gauge assembly or any evacuation or recharge equipment 2 This injector can be used to add most of the air conditioning additives to our oil system, dye, stop leaking, etc 3 This product is a pure liquid refrigerant oil filling tube, of good quality, has a long service life 4 It is not necessary to unhook the refrigerant inside the system (the system does not need in vacuum conditions)5 Suitable for filling the R134A car air conditioning cooling system (need help from a transfer tool) r12,R22 The oil can be unscrewed The cooling oil can be refilled in the car's air conditioner High pressure, oil resistant, practical, wear resistant, corrosion resistant, do not hardenInlet and outlet thread size: 1 / 4SAEOil capacity: 2 ouncesPipeline operating pressure: 600PSI-3000PSIcolour:SilverMaterial:metalsize:375mmPackage Contents:1 x Coolant filling cylinderOnly the above package content, other products are not included Note: Light shooting 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