Polarization: Linear, Size: 7.8x5.9in/ 20x15cm, Thickness: 0.22mm. | Polarizing film with adhesive: Both sides have protective film, one side is adhesive. Before you use it, please peel off film. | Wide Application: Used for Motorcycle dashboard display, projector screen, electronic watch screen. | How to use: After the polarizer is cleaned of dust, adjust the angle, cut it into the corresponding shape, and stick it on for use. | Package: 2 x Polarizing film sheet. Note: Not suitable for 3d printer.

Double sided pop up 18% Grey/white card for adjusting color balance and exposure settings in both digital and film format cameras, DV cams, light meter. | 18% gray card surface is suitable for adjusting the camera to get the accurate exposure setting. The pure white surface gives accurate color rendition to cameras and perform a white balance. | Gray card reflector is Made of durable wipe-clean surface fabric material, sewn to a sprung steel rim using row stitch technology. | Grey card folds to just a third of its 24" size making it infinitely more convenient and allowing it to fit into a carrying bag. | Package content: 1x Double Side White Balance/ Grey card, Size:24x24 inch/60x60cm

This Lens Wrench tool is all made of stainless steel (including screws), which is durable and does not rust. | Curved design: after tightening the screw hole more firmly, it will not slip or damage the lens. | It can be detached 25mm Lens to 120mm Lens. Suitable for prisms for surveying and mapping, microscopes, bird watching mirrors, etc. | The double-head design, one end is flat and the other is pointed, which is easy to use. | The screw is bigger, the operation is more convenient, and it is easier to tighten the crossbar.

Neutral Density gels: Used to help change and control the intensity of the light.Suitable for flash light, led light, strobe light etc. | Multi-functional: If the lamp that’s putting out too much light, you can slap a ND gel on that light to even out your lighting set, or put a neutral density gel on the window to cut down the intensity coming from that bright sunlight. | Polyester Film: Lighting Color Correction Gels are made of Premium smooth and flat transmission material. Steady color temperature and low light loss. Gels Can be cut into different pieces to meet your different demand. | Availablein different grades: ND3 for taking away 1 stop of light,ND6 for taking away 2 stops of light，ND9 for taking away 3 stops of light. | Package Content: 15.7x19.6inches/ 40x50cm, 2x ND3, 2xND6, 2x ND9.

Polarization: Linear, Size: 7.8x11.8 inches/ 20x30cm, Thickness: 0.19mm. | Polarizing film with adhesive: Both sides have protective film, one side is adhesive. Before you use it, please peel off film. | Wide Application: Used for Motorcycle dashboard display, small size screen, electronic watch screen. | How to use: After the polarizer is cleaned of dust, adjust the angle, cut it into the corresponding shape, and stick it on for use. | Package: 2 x Polarizing film sheet.Not suitable for 3d printer.

7.8x5.9in/ 20x15cm Polarizing film: Both sides have protective film, before you use it, you have to peel a protective film off the front and back. | Educational Application: Work great for class projects to demonstrate the effects of polarization in a very affordable way. | Physical Experiment: Linear Polarizing sheets are used in experiments relating to birefringence, light scattering, polarized light experiments, light reflection. | Photography Filter: Use to reduce the glare caused by smooth surfaces such as glass, water, paper, and certain metallic objects. | Package: 3 x Polarizing film sheet.

Mini Three-color calibrated reference cards: with Non reflective and waterproof surface, matte finish for scratch resistant. Card size:3.3x2.1 inches/ 8.5x5.4cm. Compact Size for Travel and on location. | Double sided Portable Grey/ White Board: Made of durable wipe-clean surface fabric material, sewn to a sprung steel rim using row stitch technology. size:11.8inches/ 30cm. | Grey/white Card Kit: Ideal for adjusting color balance and exposure settings in both digital and film format cameras, DV cams, light meter. | Multifunctional Use: 18% gray card surface is suitable for adjusting the camera to get the accurate exposure setting. The pure white surface gives accurate color rendition to cameras and perform a white balance. | Package: 1x Three-color calibrated reference cards, 1x Double sided Grey/ White Board.