Add to Cart Compare Alco-Screen® / Alco-Screen® 02 Control Set Chematics, Inc. MSRP: Now: $31.50 Was: Alco-Screen® / Alco-Screen® 02 Control Set 2 x 4ml bottles (1 positive control, 1 negative control) for use with Alco-Screen® and Alco-Screen® 02 products MSRP: Now: $31.50 Was: Add to Cart Compare