One piece construction with two different PVC materials that are extruded to form a highly flexible product designed especially for electrical applications Ideal for air conditioners, motors, pumps, and other similar applications Seals out abrasives, alcohol, coolants, corrosive fumes and gases, dirt, grease, mineral acids, non-concentrated fixed alkalines, petroleum oils, salt air spray, water and weather Use where vibrations or other harsh environments exist Suitable for direct burial Strong and flexible to withstand repetitive motion applications Will not rust or corrode Smooth interior for easy wire pulling 3/4 x 25 0.820 inner diameter