Shop › Duckbill Valve (Spectra compatible) Image 1 of 1 Duckbill Valve (Spectra compatible) $5.40 Silicone valve from Maymom, compatible with Spectra pumps, Set of two Get notified by email when this product is in stock. Quantity: Purchase Added! Silicone valve from Maymom, compatible with Spectra pumps, Set of two