This is a Genuine Manufacturer Approved replacement part used on specific Bostitch Nailers. This is a Rubber Ring and it is sold individually. O-rings are designed to withstand thousands of pounds of pressure by creating a seal between two or more parts. Over time O-Rings will damage and should be inspected periodically. If parts are showing signs of wear they should be replaced.
This is an authentic Bostitch replacement part manufactured for use with fine wire staplers. O-rings are used throughout staplers and are used to form air tight seals between assemblies. The pressure between parts, or chemical weathering can deteriorate an o-ring causing an air leak. Inspecting and replacing o-rings is part of normal maintenance. This o-ring is sold as an individual replacement part.
This is an original Bostitch replacement part. The return bumper is designed by the manufacturer for use in staplers. This part is made of pliable rubber, and is placed to help absorb the impact of the piston/driver assembly as it returns from punching staples into the work surface. You may require an Allen wrench or hex key when replacing this item. This part is sold individually.