It's Stoneware with new way of making. It's fired to a high temperature and mix by ash before firing. Outdoor use is acceptable.There're 2 kinds of them.
1.Mix by ash and sand
2.Mix by ash but no sand

- With Sand

E-807	E-809	E-812	E-813
38*19 / 30*14 / 22*11 Cm.	39*29 / 31*22 / 24*17 / 17*13 Cm.	35*20 / 27*16 / 19*13 Cm.	39*20 / 27*16 / 19*13 Cm.
E-808	E-811	E-810	E-814
31*24 / 27*21 / 19*16 Cm.	38*27 / 27*22 / 18*14 Cm.	31*37 / 24*32 / 19*29 / 14*23 Cm.	38*28 / 29*21 / 20*15 Cm.

- No Sand

E-785	E-786	E-787	E-805
35*37 / 28*33 / 21*29 Cm.	35*40 / 30*37 / 24*32 Cm.	34*38 / 28*35 / 22*30 Cm.	38*38 / 32*32 / 23*24 Cm.