When only the best will do-this is the hash press you need. You can compress bubble hash, kief,keif, and pollen in a flash! Made out of food grade stainless Steel the quality is outstanding.For best results weigh out your product on a digital scale and then compress it into your desired gram size .The diameter of your hash compressed is 30 MM or 1 1/8 inches round pucks.The length of your compress keif will determine on the amount of grams you put into the cylinder - maximum length 3 inches or 75 mm long You can watch a full video here all about this pollen press http://www.youtube.com/watch?feature=player_embedded&v=ZgpLHlOqvrU