Manufactured especially for natural gas, propane, butane, water, oil and chemical lines. Heavier than white tape with density of 1.35 - 1.5 grams/cubic centimeter and 4 Mil thick. Complies with MIL-T-22230A (ASG), UL 31 RO, AGA 3226 and CAN/ULC-S642. Spool - dispenser box.