Air-Tech Tank Guards provides abrasion-resistant. Its outer shell is made of durable plastic. It has unique cushioning soft air system and metallic backbone surrounded by 2 layers of durable plastic adds strength and durability .It is ultimate in protection and protects tank from scratches. Installation is quick and easy using double sided tape to any tank. It is a high-level shut-off valve for waste oil tanks employing a wilden pump as the feed pump. The unit incorporates an integral or remote sensing tube. As the waste oil is pumped into the tank, the senses change in the oil level. When the oil in the tube reaches a set level, a red pre-warning indicator becomes visible to alert operators that the oil level is getting high.