Check the listing for details. IDENTI-SPY Invisible Ink Combo Marking Kit. Condition: New. Listed at 34.95 USD. Kit includes: (1) Indenti-Spy Invisible Ink Marker (1) Indenti-Spy Invisible Ink Dauber (1) 9 Led Uv Light. Requires 3 AAA Batteries Not Included IDENTI-SPY Dauber & Marker: Clear invisible liquid. Both refillable and great for marking non porous surfaces that easily wipes off with general cleaning products. Hard to remove on skin, great for entry security control. Works best on porcelain tile, tubs, toilets, stainless steel tables, and other non porous surfaces. Test prior to using for inspections for suitability. Can stain porous surfaces. Can also invisibly mark paper products as an anti theft tool. Water based product. Seen only with (UV) light. Not permanent on hard non porous surfaces. Disclaimer: These products are simply teaching tools to teach awareness and promote proper cleaning training. By no means does the use of these products guarantee that any surfaces are clean or sanitary. They are not cleaning products but cleaning teaching tools. It is up to the instructor or user to implement the cleaning procedures they see fit and follow CDC and similar recommendations by governing bodies. We are distributors of these products and the information provided for the products on our site has been provided by the manufacturers. REFUND/RETURN POLICY: We will replace, or refund any items damaged, or defective free of any charges. We may or may not ask for a return with proof such as a photo. Your satisfaction is important to us. Any returns where free or discount shipping was offered the actual charge for shipping that was paid by us will be deducted from any refunds for all returns. Any returns for incorrect address will be refunded less shipping fees. If the order is cancelled for a refund the above policy is still in effect, and a 25% restock fee may be applied at the discretion of Black Light World. Be certain to properly pack returns to avoid damage. We will not refund the order if the order was used, seals broken, not in original packaging, or damaged.