DescriptionAre you looking for practical and professional pneumatic connectors? If yes, then you can not miss these products! Designed to rotate for preventing twisted hoses and easily locks tool onto air hoses. Simple in design and practical in use. Come and take them home!Features-Color: Black. -Material: PBT, POM and stainless steel. -Size: About 5.00X3.50X1.00cm / 1.97X1.38X0.39inch. -Applicable for PU trachea, PE trachea, nylon tube, etc. -Designed for reducing accidental air line disconnection. -Good sealing performance, rust protection and durability. -The cover is made of POM material, which is more flexible. -These products are resistant to high pressure and do not trip.