Push-In Design: Simple push-in design for tube connection and secure connection. This straight pneumatic fitting requires no additional sealing. Easy to install, and can be done in a short time High pressure resistance: high pressure resistance, no tripping, pneumatic quick connector can withstand stronger and stronger pressure without tripping, easy installation, long service life Round release ring: A round release ring on both ends facilitates pneumatic installations in confined spaces. The trigger ring adopts an elliptical design, and the disassembly is more convenient and labor-saving Good sealing performance: Thread-coated ptfe strong adhesive, with good sealing performance. 3 different sizes: This pneumatic straight quick coupler contains 30 pieces of fittings, 10 pieces of 1/4 ", 10 pieces of 5/16", 10 pieces of 3/8 " Premium quality: made from material Premium PU, this straight pneumatic fitting is sturdy, aging resistant and abrasion resistant to ensure maximum strength and durability for long lasting use