Type: Planoconvex
Dimensions: 50x45
Focal length: 75mm
Single high quality precision finished lens for a variety of light and optics experiments. 
Individually pouched and supplied in a neat presentation case.

Glass manometer with built-in stopcock mounted on backing plate. 
Backplate dimensions: 400 x 80mm.
Scale: 80-0-80 with 2mm subdivisions. 

Technical Specifications :
Tube measures approx: 406mm long and diameter of 5mm
Retaining ring is 9.5 mm
External diameter for attaching tubing: 5mm increasing to 7mm at the end near retaining ring

Small form slotted mass & hanger set.
Material: Brass
1000g total (100g Hanger, 9 x 100g Masses).
Including Hanger

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Material: Brass
Small form slotted mass & hanger set.
100g total (10g Hanger, 9 x 10g Masses).
Including Hanger.

Small form slotted mass & hanger set.
Material: Brass
Including Hanger.
Weight: 250g (50g Hanger, 9x20g, 1x10g, 2x5g Masses).

Small format cast alloy mass & hanger set
Material: Cast Alloy
With hanger
100g (9x10g Mass, 1x10g Hanger)

Small format cast alloy mass & hanger set.
Material: Cast Alloy
1000g (9x100g Mass, 1x100g Hanger).
With hanger.

Material: Cast Alloy
Flat masses, with large central hole and small slot to prevent masses sliding off hanger.
50g Hangers.
Pack of 3.
Manufactured from cast alloy, accuracy 1%.