part 2102640 O-ring Ø 4x2 Annovi Reverberi code 2102640 Details Annovi Reverberi number2102640 DescriptionO-ring Ø 4x2 ItalianGuarnizione OR Ø 4x2Qty per pump1 Also comes in KIT 43029 O-ring kit Fits these pumps Annovi Reverberi RPV 1 RPV 2 G 19 D Annovi Reverberi RPW 1 RPW 2 G 19 D