Below are parts for SKS, SFN1 series staplers. The BF0073 is for older Pre-92 models and the feeder kit is for SKS models that use the L series staples

BF0073 for older Senco SKS SFN1
BF0073 for older Senco SKS SFN1
1 new aftermarket seal BF0073
For older Senco SKS SFN1
Price includes shipping 
Available Qty: 8
Price: $12.00
Quantity:  
Senco SKS-L Feeder Kit YK0155
Senco SKS-L Feeder Kit YK0155
OEM Senco Feeder kit
For Model SKS-L (Uses L Series Staples)
Available Qty: 1
Price: $17.95
Quantity: