you can choose 30mm-66mm<br /><br />Description: <br />Color: Black<br />Material: Plastic PP<br />Flip-open design<br />Caliber: as your choice<br />Protect your scope lens from scratches & dust<br />Please note: the caliber is the internal size of the cover， also is for the external diameter of the scope， before you buy it， you need to measure hte diameter of your socpe. Please note covers are sold in singles.<br /><br />Package included: <br />1 x Lens Cover Cap