The cleansweepsupply.com product catalog, Electric/Battery Operated. http://www.cleansweepsupply.com/pages/subsection1523.html Rechargeable electric eraser weighs in at just 9 1/2 ounces! Ni-MH batteries recharge in accompanying desktop stand or connect eraser to the adapter for continuous AC. Includes recharging stand, AC adapter and two 1/4" diameter eraser strips; eraser strip refills sold separately. UL and CSA listed. Electric Eraser Type: Cordless Rechargeable; Uses Eraser Strips: Staedtler (STD-527-05); Machine Length: 9 1/2 in; GL08 Old Page: 280. http://www.cleansweepsupply.com/pages/item-std52701.html STD52701 83.07 Staedtler new http://www.oppictures.com/singleimages/240/STD52701_1_1.JPG STD52701 00031901906757 Erasers Electric/Battery Operated 110 http://www.cleansweepsupply.com/pages/item-std52701.html White eraser strip refills for Staedtler electric erasers, sold separately. 7-inch strips are 1/4" diameter. Eraser Type: Electric Eraser Refills; Material(s): Vinyl; Refill(s): N\A; Suggested Use: N\A. http://www.cleansweepsupply.com/pages/item-std52705.html STD52705 4.29 Staedtler new http://www.oppictures.com/singleimages/240/STD52705_1_1.JPG STD52705 00031901525613 Erasers Electric/Battery Operated 403 http://www.cleansweepsupply.com/pages/item-std52705.html Small but mighty electric erasing machine weighs just 15 ounces! Includes a ten-foot cord, handy hanging hook and two 1/4" diameter eraser strips; eraser strip refills sold separately. UL and CSA Listed. Electric Eraser Type: Corded; Uses Eraser Strips: Staedtler (STD-527-05); Machine Length: 8 in; GL08 Old Page: 280. http://www.cleansweepsupply.com/pages/item-std52700.html STD52700 69.20 Staedtler new http://www.oppictures.com/singleimages/240/STD52700_1_1.JPG STD52700 00031901900007 Erasers Electric/Battery Operated 156 http://www.cleansweepsupply.com/pages/item-std52700.html