The MaxEvac™ Pro Kit MAXIMIZES your vacuum efficiency for faster evacuations. The large 1/2" diameter dedicated evacuation hose MAXIMIZES the suction capacity of the vacuum pump. Smaller diameter hoses restrict flow and limit the vacuum pump from achieving its full suction capacity. The Y adapter provides a dual hose connection to any vacuum pump and the 20 micron rated valve core tools remove the restrictive high and low side valve cores to significantly increase flow. The metal hose protector keeps your hoses sealed and protects them from dirt and debris. MEPK14 MaxEvac™ Pro Evacuation Kit Includes: (2) MEH6 Black 6 ft. 1/2" MaxEvac Hose 3/8" Str. x 1/4" Str. Black, (2) MECT14 1/4” Valve Core Tool with 1/4” Side Port Fitting, (2) MEHP MaxEvac Metal Hose Protector 3/8” x 1/4", (1) UYA38 MaxEvac Y Adapter 3/8” FF x (2) 3/8” MF, (1) MaxEvac Durable Storage Bag