Package Contents: Roof replacement includes 3 NV45AB 883-901 feeders, 3 877-761 feeder spring shaft washers. Compatible: Roof replacement parts fit NV45AB, NV45AB2, NV45AB2(S) coil roof . Function: Our 877-761 Nail Feeder Spring can repair NV45AB, NV45AB2, NV45AB(S) power tools, it is a spare part for membrane roof nails and is a good repair part for roof nails. Material: Made of high-quality and durable iron alloy, our nail feeder spring is not easy to corrode and wear, and has a long service life. EASY INSTALLATION: The NV45AB2 part installs a hex wrench into the roof nail driver, saving time and effort. Colour:Black Material:Metal Package Contents: 3 * NV45AB 883-901 feeders 3 * 877-761 feeder spring shaft washers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.