1 Sided Violet Metal 405Nm Laser 21.625 x 26.5 Ryobi 665XL, etc.....50 Plates per Pkg. .008 All press sizes available, call for pricing. Can help calibrate and perform consulting on these plates. Also have all chemistry required for Violet photopolymer plates. We have the best fountain solution, ink, plate cleaners and pens for these plates too!