Laboratory Clamps / צבתות
310 - Four prong clamp made of zinc - For
        students - opening 90 mm
311 - Small, 40 mm opening Rubber covered
313 - Small, 40 mm opening Termoglass covered
314 - Micro, 40 mm opening for Holding Micro
        tubes, Rubber covered
316 - Micro, 40 mm opening for Holding Micro
        tubes, Termoglass covered
317 - Large, 70 mm opening Rubber covered
319 - Large, 70 mm opening Termoglass covered
320 - Four prong clamp - made of Aluminum -
        opening 70 mm.