Complete O-ring kit Plus the Seal LB5004 $16.00 with Free shipping in the US SN1 O-ring Kit + LB5004 SN1 O-ring Kit Seal LB5004 Price includes shippingAvailable Qty: 12Senco SN1 Feeder Spring Kit YK0020Senco SN1 Finish Nailer Feeder Spring Kit Includes parts Feeder Spring KB5191End Piece GB0146End Piece GB01472 Pins Pre '84 and Post '84Instructions Post navigation lb3499 LB3499 + BC0178 seal and top bumper for the Senco SN325 parts