Zurn Pex QCLP4XNPK10 3/4-Inch QickClamp Crimp Rings Designed for new construction or professional plumbing Utilizes brass fittings and copper crimp rings, and eliminates the need for solvents, chemicals, solder, and flame It's a no sweat plumbing methods keyed to the demand of reduced lubing costs Offers fast, efficient installations Only annealed copper crimp rings are appropriate for use with copper and brass insert fittings