... quartz tube . UU-stop quartz glass tube . far infrared quartz heating tube . opaque quartz tube , low OH quartz tube , quartz rod ,quartz plate ,quartz boat ... plate,transparent silica plate with rectangular,square,round,arc shapes and with polished or ... from us . Parameter: materialquartz,silicon dioxide>99.95%diameter1.2-50mmthickness1-50mmsurface quality60/40surface flatness10 fingesparallelism5 ...