This is a genuine Senco replacement part, it is sold individually.
The No-Mar Pad is attached to end of the safety to prevent the material that it is being used on from getting marred or dented by the safety arm.

It is a advisable to have one or two extra pads on hand as they do have a tendency to crack and deteriorate over time.

This is a genuine Senco replacement part, it is sold individually.
Its purpose is to retain or secure the Retaining Pins in the Senco models below.
It is attached to the pins by pressing them on the beveled end of the pins.

This is a genuine Senco replacement part, it is sold individually.
The Contact Foot is attached to end of the safety assembly to prevent the material that it is being used on from getting marred or dented by the safety assembly.

It is a advisable to have one or two extra pads on hand as they do have a tendency to crack and deteriorate over time. And get lost.

Genuine Senco replacement part, this item is sold individually.
The LB0018 is a seal that blocks air from leaking out of the Senco tools listed below.
Over time seals will stretch or just wear out
Putting a few drops of Pneumatic Tool Oil every time you use the tool will extend the life of the seal.

Genuine OEM Piston Retainer for Senco Nailers. This part is made out of Plastic and is sold Individually. Over time due to constant pressure on this part, it will break or crack. Damaged Retainer would leak air and would need to be replaced for the Nailer to operate properly.