Quality Material: Gel filters are made of high light-transmitting plastic and can be used as flash filters. Lightweight, high toughness, stable color temperature, and low loss. Perfect for placing on outdoor lighting or transforming ordinary LED garage lights into Christmas lights or Halloween decorations. Quantity: 18 gel light filters in total, enough for you to use. Size: 11.7 x 8.3 inches / 29.7 x 21 cm (L x W). Note: Do not leave the product close to the light source, or it will melt. Combine to use and create amazing effects: Gel filters can be combined to create different effects, such as cool effects or color correction. Or for color correction, including additive and subtractive color, color mixing, color transmission, absorption, and filtering of different wavelengths of light. It can also help children reduce frustration when reading, improve clarity, and eye movement control. Double-Sided Protective Film: There are protective films on both sides of the correction gel light filters, easy to peel off. Remove the films before use. Don't worry about being scratched, easy to remove. Color: Red Material: Plastic Package Contents: 18 x Gel Light Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item to differ slightly from the real thing. The allowed measurement error is +/- 1-3 cm.