Black EPDM rubber tube with natural polyethylene helix. Corrugated wall, smooth interior. Excellent flexibility and durability with good chemical resistance. Solid EPDM Rubber ensures seamless flow and maximum durability. Polyethylene helix allows easy handling and resists abrasion. Also available with Green helix. Resistance to light chemical and fertilizer solutions. Temperature range 30 degree F to 140 degree F.