This Self-sealing R134a Charge hose with Gauge and Tapper fit all Self-sealing R-134a cans with 1/2 acme threads, easy to install, easy to recharge auto A/C systems. 1/2" ACME thread Self-sealing can tap Tapper’s material: Solid metal construction High quality r134a charge hose Quick coupler to low side service(charging) port 2in. (D.) Gauge, 0-100psi Overall length 15in. Net weight: 9oz Description: This Self-sealing R134a Charge hose with Gauge and Tapper fit all Self-sealing R-134a cans with 1/2 acme threads, easy to install, easy to recharge auto A/C systems. 1/2" ACME thread Self-sealing can tap Tapper’s material: Solid metal construction High quality r134a charge hose Quick coupler to low side service(charging) port 2in. (D.) Gauge, 0-100psi Overall length 15in. Net weight: 9oz