... a comprehensive range of hotplate , units are available in four sizes 14x14cm , 18 x 18cm ,23 x23 cm, and 28 x ... ,PID Control .c. Excellent Temperature Uniformity . d.Available in four sizes ,14 x14 cm , 18 x 18cm ,23 x 23 cm ... -positional Hotplate Main parameter Standard Outfits Clip Removable Holder 4 sizes ceramic surface small Digital Laboratory hot plates