This is a Stenner package of 2 QuickPro Pump Heads #4 replacements with Santoprene tubes and rated for 25 psi. The replacement pump heads include tubes, duckbills and 1/4 inch ferrules and works with the Classic and SVP model pumps. The QuickPro pump head provides tube replacement without tools with a collapsible roller assembly and a tube housing cover attached with latches.
If you need more than one replacement, the package of two will save you money.