Steel Extension Spring, 6 x 0.25" Category_Science Gifts Three-legged spherometer with legs spaced

Three-legged spherometer with legs spaced 40 mm apart and a vertical scale reading -10 to +10 mm at 0

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

6oz each in a 4-pack for chemistry-themed home entertaining and science enthusiast gifting

transferring

Fitted with a grey hand knob for tightening and a small plastic pulley

Steel Extension Spring, 6 x 0.25" Category_Science Gifts Three-legged spherometer with legs spacedSix inch steel extension spring with looped ends at 0. 25 inch diameter, the mid length option for paired Hooke's Law comparisons against 4 inch and 9 inch siblings in the series.