MAPEI Flexcolor CQ 1 Gallon Avalanche Acrylic Premix Grout Lag Bolts Built In Thermostat Shape Round Voltage Built In Thermostat Shape Round Voltage (volts) 24 Power Options Hardwired Thermostat Type Heating and Cooling Pack Size 1 Included Mounting Hardware Fits in your existing electrical box and does not require new wires for typical installation color consistency and improved workability Chemical and stain resistant with no sealing required For grout joints from 1 16 in to 1 2 in Mold and mildew resistant For use in intermittently wet areas including shower floors and walls Don't forget your color matched MAPEI caulk Dries to a hard natural stone