** Shares of dental products manufacturer Align Technology ALGN.O fall 4.30% to $207.06 premarket

** Co expects Q1 revenue to be between $965 million and $985 million, below estimates of $1.03 billion - LSEG data

** ALGN, which manufactures some of its teeth aligners in Mexico and ships them to U.S., said tariff situation "remains very fluid" and that it was monitoring events closely

** Says it is still more economical to ship clear aligners to U.S. from Mexico due to variety of factors, including incremental additional freight costs incurred if co ships from its Polish facility

** ALGN can likely pass on some pricing pressure to customers, brokerage Leerink Partners says

** Up to last close, stock has fallen ~21% in last 12 months

(Reporting by Sriparna Roy)