Quick view 2-1/2" Round Rubber Bumper Trailer Door Stop Round Rubber Bumpers. 2-1/2 inch round. Screw into place on ramp doors or anywhere a swinging door or window might damage another part of your equipment. Multiple uses - also works great as a dock bumper or a door stopper to prevent your door... MSRP: Was: Now: $1.99 Add to Cart Compare