This is a 1 part resin replica Model 89, 50mm Japanese mortar round. This resin model is cast in one piece with a handmade metal pin and fiber pull cord. It is a good alternative to carrying your expensive original into the field, or an excellent display piece. The INERT mortar round was cast in a silicone mold so it holds all of the detail of the original. The Model 89 resin replica is cast all black, with a metallic filler, but you can paint the resin round for increased authenticity.