Conti®Alert is available in our abrasion-resistant lineup of ContiTech Select Conveyor Belt specs and compounds: › Belt Specs Plylon Plus 250/2, 375/3, 500/4, and 600/3 with a minimum 3/16" x1/16" to a maximum of 3/8" x1/8" covers ... systems which utilize screw take-ups Typical material: Limestone, granite, ores, taconite, cement, rock, etc ...