7 x45 High Efficiency Polyester Paint Booth ArrestorKoch 503 422 004 (4 pcs) heil quaker icp designed specifically for Trane HVAC FLRQB5AH21M11 designed specifically for Trane HVAC systems Ideal for installations requiring 45 in lb torque without the need for spring return functionality 9% Efficiency Reduces the number of change outs and down time Long Filter Life Multiple Capacity & Efficiency levels SprayStop Expanded Paper Paint Arrestors follow the industry standards by complying with N SprayStop Expanded Paper paint arrestors are disposable paint overspray collectors that are designed to prevent paint solids from reaching the exhaust stack