Amazon.com: Hawkins silver Stainless Steel, Rubber, Aluminium Vent Weight Safety Valve Bundle/Set of Hawkins Gasket Whistle A10-09, B10-10 H10-20 for Classic/Contura and 2 to 3 L Pressure Cookers - Set of 3 :
Amazon.com: HAWKINS Pack of 2 Pressure Cooker Vent Weight Pressure Regulator Spare Part/Pressure Cooker Part (B10-20) : Everything Else
Hawkins Regulator Vent Weight for Aluminum and Stainless Steel Pressure Cooker | eBay
Amazon.com: Hawkins silver Stainless Steel, Rubber, Aluminium Vent Weight Safety Valve Bundle/Set of Hawkins Gasket Whistle A10-09, B10-10 H10-20 for Classic/Contura and 2 to 3 L Pressure Cookers - Set of 3 :