Check the listing for details. LaMotte Insta Test Strips TEST Phosphate 3021G. Condition: New. Listed at 14.99 USD. LaMotte Insta-TEST Phosphate Test StripsTests: Phosphate levels(0 – 2,500 ppb) in just 15 seconds (25 per bottle)LaMotte Insta-TEST Phosphate Test Strips, Tests: Phosphate levels (0-2,500 ppb) in just 15 seconds.25 per bottle6 per caseDirections:It is a violation of Federal law to use this product in a manner inconsistent with its labeling.NOTE: Keep cap on tight and store at room temperature.Fill test tube (0106) to 10 mL line. Remove one test strip from bottle. Close bottle cap tightly after removing strip. Gently bend strip in half (do not fold) with pads facing inward. Place strip inside test tube cap (as shown). Cap test tube and invert slowly 5 times (invert the tube slowly to allow the bubble to go from the top to bottom and bottom to top). Remove cap and test strip Place bottom of test tube on white boxed area of color chart. Look down through OPEN test tube (as shown) and compare to color chart.Item SpecificationsItem Weight0.45 lbs per EA