... without edges Can open and closed, drill holes Machine cover Silvery acrylic half ball/ hemisphere&ball&sphereAcrylic ... ,grinding,polishing,laser engraving,sandblast,stickingProduct characteristic(1) Material:high light transparent or colored acrylic (2) high ... inquiry and detailed information Purchase process:Remarks: 1. How to clean and maintenance? Generally speaking,acrylic item dose not ...