1.screw cap 2.sharp bottom 3.Material: PP 4.various colors (green,orange,blue,red) 5.ISO9001 ... in different sizes,such as 0.2, 0.5, 1.5, 2, 5, 7, 10, 15, 50ml and 100ml. ... Size Packing SHA33Centrifuge tube,screw linking cap,white 1.5ml500pieces/bags,28 bags/cartons SHA34centrifuge tube, ... cartons SHA37centrifuge tube,screw cap,green,conical bottom 1.5ml500pieces/bags,28 bags/cartons SHA38centrifuge tube, ...