Swimquip Filter Grid Element Center Port - 18 x 11 Inches gallons-per-minute_90-99 90 inches for the rail

90 inches for the rail tubing and the distance between the front (pool) rail and back (anchor) rail is 30 inches

This is a PVC Schedule 80 Union with Slip x FIPT connections measuring 3/4 inch

matte backside

This is a 1 ounce bottle of LaMotte Calcium Hardness #2 for Dipcell Series Test Kits

It replaces 7038-G

Swimquip Filter Grid Element Center Port - 18 x 11 Inches gallons-per-minute_90-99 90 inches for the railThis is a Swimquip compatible filter element grid with center port measuring 18 x 11 inches. The thickness of the grid is . 875 inches. Universal Filter Grids for Diatomaceous Earth filters feature a reinforced center core for added durability and chemical resistance, and sonic welded seams to prevent fraying. Their proprietary D. E. grid cloth outlasts all others. They have superior strength fabric and heavy nylon stiches. TIP: Place filter manifold