property used in the trade or business

property used in the trade or business, of a character which is subject to the allowance for depreciation provided in section 23(l), held for more than 6 months, and real property used in the trade or business, held for more than 6 months, which is not (A) property of a kind which would properly be includible in the inventory of the taxpayer if on hand at the close of the taxable year, or (B) property held by the taxpayer primarily for sale to customers.