... writer's cramp. Teacher Rewarding Self inking Stamp Set Specification:1) Material:PS,ABS2)Size:4. ... Blue,Green,Purple,Yellow4)Stamp's content OEM welcome5)MOQ:5000sets6)Stamp's content OEM welcome ... Features:1)8 fun and unique self-inking stamps,idea for teachers,Home educaters and parents2) Set ... ,orange and green ink! 4) Each stamp has a matcking cover to protect the ink ...