Fresnel Lens Magnifier, Diameter 100mm (4''), Focal Length 100mm, Acrylic Lens (not Glass), for Physics Classroom,Solar Heating,Magnifiying. (Focal Length 100mm) auspowers_batchone LZQ-7 Flowmeter 2-20LPM Acrylic Air

LZQ-7 Flowmeter 2-20LPM Acrylic Air Gas Flowmeter with Control Valve for Measuring Controlling Gas Flow

Hot glue gun

Specifications: Construction: Nylon Box Dimensions: 2"H x 6"W x 7"L WT: 0

24007 1/8-3mm x 4-1/4-Inch

they are light weight and mini size to use

Fresnel Lens Magnifier, Diameter 100mm (4''), Focal Length 100mm, Acrylic Lens (not Glass), for Physics Classroom,Solar Heating,Magnifiying. (Focal Length 100mm) auspowers_batchone LZQ-7 Flowmeter 2-20LPM Acrylic AirFresnel Lens Magnifier, Diameter 100mm (4''), Focal Length 100mm, Acrylic Lens (not Glass), for Physics Classroom,Solar Heating,Magnifiying. (Focal Length 100mm) Size: ? 100mm Thickness: 2mm Material: PMMA (acrylic) Groove pitch: 0. 5mm Transmission (%): 92 (from 400 1100nm) Index of Refraction nd : 1. 491 Operating Temperature (C): 80 (Maximum) Product Features 1 Pack Round Fresnel Lens Magnifier Size: 100mm, Thickness: 2mm, Material: PMMA (Acrylic)