What's in the box:

2pcs Bullet Piercing Tap Valve Kits Compatible with 1/4, 5/16, 3/8 Inch Outer Diameter Pipes, Car Air Conditioning Refrigerant Charging Hose with Gauge, Connect to R12/ R22 Port Only (Standard)

Features:
Made of corrosion-resistant metal, won't wear out or rust over time.
A convenient replacement part for you to use. The hose adopts high-quality rubber material, good pressure resistance and reliable.
Comes with gauge for easily viewing during use, connect to the R-12/ R-22 port for easy conversion. It fits cans with the thread of 1/2 inch only.
This refrigerant charging pipe with built-in safety valve to prevent accidental venting of refrigerant.
It can be applied for home air-conditioning and car air-conditioning to add refrigeration.

Specifications:
Color: Blue+sliver
Material: Aluminum + Copper + Rubber
Quantity: 2pcs
Compatible with 1/4 inch, 5/16 inch, 3/8 inch outside diameter pipes
Package Weight: Approx.125g
Package Size: Approx. 10 * 8 * 3cm

Package List:
2 x bullet piercing tap valve kit
1 x R12 R22 charging hose with gauge