4-Prong Cork-Lined Retort Clamp with Boss Head, 90mm Capacity Lab Supplies_Lab Burner Accessories Beech wood test tube rack

Beech wood test tube rack holds 12 tubes up to 20mm diameter in a 9-inch frame for organized storage during chemistry and biology experiments

Thirty-two-inch advanced pulley demonstration set with 8 singles

this 20mm-diameter steel helix carries longitudinal

teaching electromagnetism

Hand-painted skin cross-section enlarged 300 times exposes epidermal layers

4-Prong Cork-Lined Retort Clamp with Boss Head, 90mm Capacity Lab Supplies_Lab Burner Accessories Beech wood test tube rackFour prong cork lined retort clamp with an integrated boss head, gripping objects up to 90 mm and mounting to support rods up to 15 mm for chemistry and physics setups.