The SKU is also refereed to as the item part number. This can befound on the outside of the product carton and sometimes on your receipt, it is not on the product instructions, those numbers are specific to the instructions.
The SKU or part number is a 7 digit number starting with an 8, example 8000148. Sometimes on cartons and receipts it is shortened to 4 digits, example 0148. If you can't find it, no worries, let us the name of the product you purchased and we can get you the SKU.
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