Senco Stapler M1 M2+ M3+ SC1 Rebuild Kit includes O-ring Kit + LB5005 + BB0147 by William Hendricks Also Available on eBaySenco Stapler M1 M2+ M3+ SC1 Rebuild Kit includes O-ring Kit + LB5005 + BB0147O-ring kit + Valve Seal LB5005 + Bumper BB0147 For Make: Senco For Model: M1 M2+ M3+ SC1 Available Qty: 6