After market O-ring kit for the senco-matic model PW staplers, all the O-rings in the tool.
Also have these on ebay Senco PW Rebuild Kit
The first kit below, O-rings + seal LB5002 matches the Senco kit YK0378, EXCEPT it does not include the bumper BB0101

Senco PW O-ring and Washer Valve Seal LB5002
Senco PW O-ring and Washer Valve Seal LB5002
O-ring kit for the senco PW + PW-2
+ Washer Firing Valve Seal LB5002
All O-rings in the tool.
Schematic break down and O-ring reference sheet with every order.
Senco LB5002
Senco LB5002
Senco Firing Washer Valve LB5002
For Models PW + PW 2
Available Qty: 9
Senco PW Roofing Gun Blade Seal BB0086
Senco PW Roofing Gun Blade Seal BB0086
These are aftermarket blade seals for the Senco PW Roofing Stapler. Made of very tough polypropylene.
This is a copy of an aluminum one produced by Senco.
Available Qty: 4