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All mortar tubes are HDPE (High Density PolyEthylene), the standard for safety in the fireworks industry. 3 HDPE Mortar Tube DR17 Mortar, 18 length (3.05 ID)
3" HDPE DR17 Mortar Tube - 18" length - 3.05" ID. All mortar tubes are plugged. All mortar tubes are HDPE (High Density Poly Ethylene) - the standard for safety in the fireworks industry.