4902 Jar base cap: jar base cap is compatible with most for blender jars.However, it is not suitable for blstmb-cbg-000 Pro 1200 blender.Please make sure the models, easy to install, no other tools needed Good function: 4961-011 ice blade can replace part 4961, compatible with most for 5 and 6 cup glass or plastic jars, 6 blade design can cut things easily, bring convenience to your kitchen O-ring gasket seal: the gasket fits around the base of blender blade plate, compatible with most for kitchen centers except for Pro 1200, 't take you much time to accomplish installing Nice material: blade is made of high quality material which is enough to crush ice, and the jar base cap is made of hard material, not easy to break, ring gaskets is soft and colour:Photo color Material:Metal + plastic Package Contents: 2 x 6 blades 1 x rubber ring 1 x tank bottom Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.