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40 Pieces Straight Push Connectors, Push to Connect Fittings Kit Quick Release Pneumatic Connectors Air Line Fittings Connect Air Hose Fittings, 2 Way (Black,1/4 5/16 3/8 1/2) auspowers_batchone uxcell 40 Pcs 1 Pin40 Pieces Straight Push Connectors, Push to Connect Fittings Kit Quick Release Pneumatic Connectors Air Line Fittings Connect Air Hose Fittings, 2 Way (Black,1 4 5 16 3 8 1 2) Features: Simple push in design for connecting to the tube and provide secure connection, requires no extra sealing. Round release ring on two ends facilitates pneumatic installations in confined spaces. High pressure resistance, no tripping, can withstand greater and stronger