SF3813 Features a heavy-duty all brass holder with a textured grip. The brass cap is a valve core wrench tool. SF3813 comes with 3 valve cores. The valve cores are stainless steel and brass and are rated for CFC, HCFC and HFC refrigerants. The cores are pressure rated for R410A and manufactured to ARI 720-97 standard.Holds 3 coresBrass construction3 in. LCores manufactured per ARI 720-97. This product can expose you to chemicals including Lead and Lead compounds, which are known to the State of California to cause cancer and developmental harm. For more information, go to www.P65Warnings.ca.gov