1. Internal hollow design, light and heavy, convenient for small fish activities 2. Fine color, realistic form 3. Environmental protection material, safe and harmless 4. Various shapes, meticulous workmanship 5. Material: resin 6. Use: fish tank aquascape, ornaments, decorations 7. Size: - Cave mountain C about 10.5 x 5 x 10.5cm - Cave mountain D about 10.4 x 6.1 x 9.5cm - Small rockery about 11.9 x 8.2 x 12.5cm - Three-legged rockery about 15.7 x 10 x 14cm - Large rockery about 21.8 x 7.7 x 16.7cm - Shunfeng mountain about 18.5 x 4.7 x 15.5cm - Yu mountain about 22 x 7.2 x 17cm - Tianzhu mountain about 18.2 x 8.2 x 35cm - Guangyun mountain about 19 x 11 x 34cm - Jiuxiao mountain about 26.8 x 13.5 x 27cm - Xianju mountain about 23.5 x 9.5 x 15.5cm - Shenyan mountain about 24.3 x 8 x 14.5cm - Xiaoyao mountain about 21 x 9.5 x 17.9cm