PLEASE NOTE: AUTOBLOW AI SLEEVES ARE NOT COMPATIBLE WITH AUTOBLOW 2 AND AUTOBLOW 2 XT MACHINES - Interchangeable sleeves come in 3 sizes to accommodate all men - Sleeves are made from realistic artificial skin material - Sleeves are easy to clean - Springs expand to give you a tight fit - Strokes a full 10 cm up and down - All-metal industrial strength motor is powerful and built to last - Plugs into any wall outlet - never needs batteries</p>