*Refrigeration Pressure Gauge Connection: 1/4"SAE Working Pressure: ... glass aluminum alloy testing manifolds1, 3pcs red,yellow,blue charging hoses2, Designed to meet 1/4"SAE requirement ... 136-G-R12&R2236"(90CM)3pcs red,yellow,blue charging hoses. Working pressure 500PSI Burst 2500PSI.A sight ... CT-236-G-R134A36" (90CM)3pcs red,yellow,blue charging hoses. Working pressure 600PSI Burst 3000PSI.A sight glass ...