Lemonbest Car AC Air Conditioner Refrigeration R134A R12 Converting Adapter Hose Set Kits 8 Pcs Material: Rubber + metal, strong sealing Easy to use and install Front Placement on Vehicle Hose Size: 1/4"x3/16", 1/4"x1/8", 3/8"x1/4", 1/2"x1/4" Adapter Size: 1/4"x1/4", 1/4"x3/16", 1/4"x1/8"