Small (about 1" length), basic push-on endpin stopper. Flexible, fits cello and bass endpins with end spike under 1/4" diameter. Good, grippy rubber; made to be an endpin stopper (not just a generic hardware-store stopper). Many new endpins (including a majority of new school cellos and basses) come with this type of push-on stopper, and they are easily lost. Provides simple protection for floors and against shin lacerations. Fancy cello (see photos) available separately.