These clamps are constructed from steel and feature plastic covered spring jaws. Available in single and double versions, these clamps accept burettes up to 35mm O.D., and can be used with support rods up to 1/2" O.D. Additional Info: Steel Burette Clamp With Plastic Coated Spring Jaw, Single Package Size(L x W x H): 6.5 X 3 X 2.3 (IN) Categories: Clamps, Burette HTS Code: 8205.70.0090 UNSPSC: 4.11224e+007 Country Of Origin: INDIA