Class 2 and 4 high-voltage insulating rubber blankets meet or exceed ASTM D1048 standards. Eyelet style blankets can be secured with blanket pins, Snap Buttons, or Ty-Straps (sold separately). Slotted Style blankets can be used to cover interferences that a normal blanket will not cover and are available with eyelets or velcro. Blankets are also available without eyelets. Blankets need to be tested every 1 year, according to ASTM F479 specifications. Lower class blankets are also available.