Overview Reviews Product Description External air sealing kit uses magnetic strips to seal openings at the base and the roof of up to 10 NetShelter SX racks, preventing air recirculation and increasing cooling efficiency. Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × APC APC NetShelter SX External Air Sealing Kit (qty 10) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments