Krause Industries offers a full line of PVC well screens, slotted well screens, casings and accessories that provide an economical, long-lasting design option when compared to steel. Krause Industries well products are carefully designed and manufactured to required industry standards, with tolerances that meet or exceed any other supplier in the industry. Well screens should have as large a percentage of non-clogging slots as possible, be resistant to corrosion, have sufficient strength to resist collapse, and select a slot size which will retain 40-60 percent of the material.