Reference IK Foam Pro 12 ALK kit 82682800 Compatible Products IK FOAM Pro 12 Alk Select the appropriate felt according to the pH of the product to be sprayed. Use the white felt as a general rule for all chemicals except extreme alkalis. Use the grey felt for extreme alkalis (pH 11-14) Pieces Part # Quantity Complete Elbow Ik Foam Pro 12 ALK No. 1495 82682611 - 1 Felt Disc Diameter 11 No. 1233 81776313 - 1 Felt Disc Diameter 11 PP No. 1511 81686313 - 1