Kemper SSUF Improved Sponge Sander
Useful for finishing a variety of materials including metal clay, silver, copper, gold and other soft metals. The sponge's small size fits comfortably in your hand, and the SoftTouch foam backing flexes easily. You can polish curves and contours. The Sponge can be used wet or dry.
This Ultra Fine sponge has a 800 - 1000 grit.
Measures approximately 2-1/2" x 4-1/2".