the teaching aid, plastic compasses, arm 50cm long or longer 1)compasses2)arm 50cm long or longer Shindow International Trading Co.,ltdHave years of experience in specializing in Promotion Supplies , Office & School supplies,Plush & stuffed toys and KeychainsIf you are interested in it and want to have more information,or have requires,please feel free to contact us.We will try our best to meet ...