Plunge into the tranquility of the SaunaLife Model S1B hot and cold immersion tub in elegant black. A must-have for home workout recovery or as a cold-plunge after a hot sauna session. Black Thermo-Pine materials (lasts up to 2X longer than Cedar) Luxury outdoor cold/hot immersion tub Designed for outdoor ergonomic cold/hot tub bathing experiences Spacious interior holds over 124 gallons of pure water bathing pleasure Thick contoured fiberglass lining provides enhanced bather comfort Durable Black Thermo-Pine tub surround (1.65" thick 0.74cm) Matching Black Thermo-Pine wood steps for easy access Exterior dimensions -41.3 "H (105cm) x 40" Diameter(102cm) Interior dimensions - 34.4" Diameter (87cm) x 36" Deep (91cm) Designed by SaunaLife and handcrafted in Northern Europe Foundation Beams 3.94" (10cm) x3.94" (10cm) Chiller Connections 3/4" (2cm) NPT Fiberglass Insert - Grey - Ergonomic