The SharkBite barb connection system is the best option for connecting PEX tubing in water distribution systems when lower material cost is desired. Constructed of copper, the SharkBite copper crimp rings are used in conjunction with barb fittings and crimp tools. And with a wide range of fittings, manifolds, regulator, thermostatic, and ball valves available, the SharkBite barb connection system is perfect for your next plumbing project.. Accessory Type: Collar. Compatible Pipe Material: PEX. Material: Stainless Steel. Pack Size: 100. Pipe or Fitting Product Type: Accessory. Product Weight (lb.): .02 lb. Returnable: 90-Day. Compatible Pipe Size (in.): 3/4 in. Product Depth (in.): 1 in. Product Height (in.): .326 in. Product Width (in.): 1 in. Material: Stainless Steel