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Blue v-alve with 1/4 SAE interface, which is suitable for works with R22 air conditioner. Red v-alve with 5/16 SAE interface, which is suitable for works with R410 air conditioner. This set includes 1pcs R22 v-alve, 1pcs R410 v-alve and 1pcs 1/4 SAE adapter. The adapter is used to transform hose thread from 5/16 SAE to 1/4 SAE. Made of quality copper material, thickened v-alve body, with fine durability.