Check the listing for details. Nest Learning Thermostat 1st/2nd/3rd/E/New Generation FLAT-HEAD Screws Set. Color: Gray, Condition: New. Listed at 5.99 USD. No Nest Thermostat! Only Screws! What included: two stainless steel FLAT-HEAD screws. Specification: 30 mm length; 8 mm cap/head diameter; 1.15 mm cap/head thickness. BE AWARE: other normal round tip screws will cause disconnection of Nest thermostat and loss of AC/heating! Screws Set for Nest Learning Thermostat 1st/2nd/3rd/E/New Generation. Condition is New. Shipped with USPS First Class Package. Attention: the flat-head nuts are essential to secure your precious Nest thermostat onto the dry wall directly. No return for this item due to penny profit! Please make sure that you need this, any questions feel free to ask. Thank you! Note: welcome to take a look my other listings of nest plates, all the plate set include 2 long screws and 2 short nuts, plus the plate set, it's a better deal!